Original Verse:
John Chapter 1 Verse 51And he said to him, Truly I say to you all, You will see heaven opening and God's angels going up and coming down on the Son of man.

Reference Verses:
Ezekiel Chapter 1 Verse 1Now it came about in the thirtieth year, in the fourth month, on the fifth day of the month, while I was by the river Chebar among those who had been made prisoners, that the heavens were made open and I saw visions of God.
Matthew Chapter 3 Verse 16And Jesus, having been given baptism, straight away went up from the water; and, the heavens opening, he saw the Spirit of God coming down on him as a dove;
Luke Chapter 3 Verse 21Now it came about that when all the people had been given baptism, Jesus, having had baptism with them, was in prayer, when, the heaven being open,
Revelation Chapter 19 Verse 11And the heaven was open; and I saw a white horse, and he who was seated on it was named Certain and True; and he is judging and making war in righteousness.
Acts Chapter 7 Verse 56And he said, Now I see heaven open, and the Son of man at the right hand of God.
Acts Chapter 10 Verse 11And he saw the heavens opening, and a vessel coming down, like a great cloth let down on the earth,
John Chapter 3 Verse 5Jesus said in answer, Truly, I say to you, If a man's birth is not from water and from the Spirit, it is not possible for him to go into the kingdom of God.
John Chapter 13 Verse 38Jesus said in answer, Will you give up your life for me? Truly I say to you, Before the cry of the cock you will have said three times that you are not my disciple.
John Chapter 21 Verse 18Truly I say to you, When you were young, you made yourself ready and went wherever you had a desire to go: but when you are old, you will put out your hands and another will make you ready, and you will be taken where you have no desire to go.
Genesis Chapter 28 Verse 12And he had a dream, and in his dream he saw steps stretching from earth to heaven, and the angels of God were going up and down on them.
Matthew Chapter 16 Verse 28Truly I say to you, There are some of those here who will not have a taste of death, till they see the Son of man coming in his kingdom.
Mark Chapter 1 Verse 10And straight away, coming up out of the water, he saw the heavens broken open and the Spirit coming down on him as a dove:
Luke Chapter 2 Verse 9And an angel of the Lord came to them, and the glory of the Lord was shining round about them: and fear came on them.
Matthew Chapter 16 Verse 13-16 [13] Now when Jesus had come into the parts of Caesarea Philippi, he said, questioning his disciples, Who do men say that the Son of man is? [14] And they said, Some say, John the Baptist; some, Elijah; and others, Jeremiah, or one of the prophets. [15] He says to them, But who do you say that I am? [16] And Simon Peter made answer and said, You are the Christ, the Son of the living God.
Mark Chapter 14 Verse 62And Jesus said, I am: and you will see the Son of man seated at the right hand of power, and coming with the clouds of heaven.
Revelation Chapter 4 Verse 1After these things I saw a door open in heaven, and the first voice came to my ears, like the sound of a horn, saying, Come up here, and I will make clear to you the things which are to come.
Acts Chapter 1 Verse 11And said, O men of Galilee, why are you looking up into heaven? This Jesus, who was taken from you into heaven, will come again, in the same way as you saw him go into heaven.
Matthew Chapter 9 Verse 6But so that you may see that on earth the Son of man has authority for the forgiveness of sins, (then said he to the man who was ill,) Get up, and take up your bed, and go to your house.
Matthew Chapter 16 Verse 27For the Son of man will come in the glory of his Father with his angels; and then he will give to every man the reward of his works.
Daniel Chapter 7 Verse 10A stream of fire was flowing and coming out from before him: a thousand thousands were his servants, and ten thousand times ten thousand were in their places before him: the judge was seated and the books were open.
Acts Chapter 1 Verse 10And while they were looking up to heaven with great attention, two men came to them, in white clothing,
2nd Thessalonians Chapter 1 Verse 7-9 [7] And to you who are troubled, rest with us, when the Lord Jesus comes from heaven with the angels of his power in flames of fire, [8] To give punishment to those who have no knowledge of God, and to those who do not give ear to the good news of our Lord Jesus: [9] Whose reward will be eternal destruction from the face of the Lord and from the glory of his strength,
1st Timothy Chapter 3 Verse 16And without argument, great is the secret of religion: He who was seen in the flesh, who was given God's approval in the spirit, was seen by the angels, of whom the good news was given among the nations, in whom the world had faith, who was taken up in glory.
Hebrews Chapter 1 Verse 14Are they not all helping spirits, who are sent out as servants to those whose heritage will be salvation?
John Chapter 3 Verse 13And no one has ever gone up to heaven but he who came down from heaven, the Son of man.
John Chapter 3 Verse 14As the snake was lifted up by Moses in the waste land, even so it is necessary for the Son of man to be lifted up:
John Chapter 5 Verse 27And he has given him authority to be judge because he is the Son of man.
John Chapter 12 Verse 23And Jesus said to them in answer, The hour of the glory of the Son of man has come.
Daniel Chapter 7 Verse 13I saw in visions of the night, and there was coming with the clouds of heaven one like a man, and he came to the one who was very old, and they took him near before him.
Zechariah Chapter 13 Verse 7Awake! O sword, against the keeper of my flock, and against him who is with me, says the Lord of armies: put to death the keeper of the sheep, and the sheep will go in flight: and my hand will be turned against the little ones.
Matthew Chapter 25 Verse 31But when the Son of man comes in his glory, and all the angels with him, then will he be seated in his glory:
Matthew Chapter 26 Verse 24The Son of man goes, even as the Writings say of him: but a curse is on that man through whom the Son of man is given up; it would have been well for that man if he had never come into the world.
Luke Chapter 22 Verse 69But in the future the Son of man will be seated at the right hand of the power of God.
Daniel Chapter 7 Verse 9I went on looking till the seats of kings were placed, and one like a very old man took his seat: his clothing was white as snow, and the hair of his head was like clean wool; his seat was flames of fire and its wheels burning fire.
Matthew Chapter 4 Verse 11Then the Evil One went away from him, and angels came and took care of him.
Luke Chapter 2 Verse 13And suddenly there was with the angel a great band of spirits from heaven, giving praise to God, and saying,
Luke Chapter 22 Verse 43And an angel from heaven came to him, to give him strength.
Luke Chapter 24 Verse 4And while they were in doubt about it, they saw two men in shining clothing by them:
Jude Chapter 1 Verse 14The prophet Enoch, who was the seventh after Adam, said of these men, The Lord came with tens of thousands of his saints,
Daniel Chapter 7 Verse 14And to him was given authority and glory and a kingdom; and all peoples, nations, and languages were his servants: his authority is an eternal authority which will not come to an end, and his kingdom is one which will not come to destruction.
John Chapter 16 Verse 20Truly I say to you, You will be weeping and sorrowing, but the world will be glad: you will be sad, but your sorrow will be turned into joy.
John Chapter 3 Verse 3Jesus said to him, Truly, I say to you, Without a new birth no man is able to see the kingdom of God.
John Chapter 6 Verse 53Then Jesus said to them, Truly I say to you, If you do not take the flesh of the Son of man for food, and if you do not take his blood for drink, you have no life in you.
John Chapter 5 Verse 19So Jesus made answer and said, Truly I say to you, The Son is not able to do anything himself; he is able to do only what he sees the Father doing; whatever the Father does the Son does it in the same way.
John Chapter 6 Verse 26Jesus, answering them, said, Truly I say to you, You come after me, not because you saw signs, but because you were given the bread and had enough.
John Chapter 6 Verse 32Jesus then said to them, Truly I say to you, What Moses gave you was not the bread from heaven; it is my Father who gives you the true bread from heaven.
John Chapter 13 Verse 21When Jesus had said this he was troubled in spirit, and gave witness, saying, Truly I say to you, that one of you will be false to me.
John Chapter 16 Verse 23And on that day you will put no questions to me. Truly I say to you, Whatever request you make to the Father, he will give it to you in my name.
John Chapter 5 Verse 24Truly I say to you, The man whose ears are open to my word and who has faith in him who sent me, has eternal life; he will not be judged, but has come from death into life.
John Chapter 5 Verse 25Truly I say to you, The time is coming, it has even now come, when the voice of the Son of God will come to the ears of the dead, and those hearing it will have life.
John Chapter 6 Verse 47Truly I say to you, He who has faith in me has eternal life.
John Chapter 8 Verse 34And this was the answer Jesus gave them: Truly I say to you, Everyone who does evil is the servant of sin.
John Chapter 8 Verse 51Truly I say to you, If a man keeps my word he will never see death.
John Chapter 8 Verse 58Jesus said to them, Truly I say to you, Before Abraham came into being, I am.
John Chapter 10 Verse 1Truly I say to you, He who does not go through the door into the place where the sheep are kept, but gets in by some other way, is a thief and an outlaw.
John Chapter 10 Verse 7So Jesus said again, Truly I say to you, I am the door of the sheep.
John Chapter 12 Verse 24Truly I say to you, If a seed of grain does not go into the earth and come to an end, it is still a seed and no more; but through its death it gives much fruit.
John Chapter 13 Verse 16Truly I say to you, A servant is not greater than his lord; and he who is sent is not greater than the one who sent him.
John Chapter 13 Verse 20Truly I say to you, He who takes to his heart anyone whom I send, takes me to his heart; and he who so takes me, takes him who sent me.
John Chapter 14 Verse 12Truly I say to you, He who puts his faith in me will do the very works which I do, and he will do greater things than these, because I am going to my Father.