John 1:51

"And he saith unto him, Verily, verily, I say unto you, Hereafter ye shall see heaven open, and the angels of God ascending and descending upon the Son of man."

Cross References (ranked by relevance)

Genesis 28:12 43

And he dreamed, and behold a ladder set up on the earth, and the top of it reached to heaven: and behold the angels of God ascending and descending on it.

Acts 7:56 18

And said, Behold, I see the heavens opened, and the Son of man standing on the right hand of God.

Mark 1:10 13

And straightway coming up out of the water, he saw the heavens opened, and the Spirit like a dove descending upon him:

Luke 22:43 13

And there appeared an angel unto him from heaven, strengthening him.

Mark 14:62 11

And Jesus said, I am: and ye shall see the Son of man sitting on the right hand of power, and coming in the clouds of heaven.

Acts 10:11 11

And saw heaven opened, and a certain vessel descending unto him, as it had been a great sheet knit at the four corners, and let down to the earth:

Luke 2:13 11

And suddenly there was with the angel a multitude of the heavenly host praising God, and saying,

Matthew 3:16

And Jesus, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him, and he saw the Spirit of God descending like a dove, and lighting upon him:

Ezekiel 1:1

Now it came to pass in the thirtieth year, in the fourth month, in the fifth day of the month, as I was among the captives by the river of Chebar, that the heavens were opened, and I saw visions of God.

Luke 3:21

Now when all the people were baptized, it came to pass, that Jesus also being baptized, and praying, the heaven was opened,

Matthew 4:11

Then the devil leaveth him, and, behold, angels came and ministered unto him.

2 Thessalonians 1:7

And to you who are troubled rest with us, when the Lord Jesus shall be revealed from heaven with his mighty angels,

Luke 2:9

And, lo, the angel of the Lord came upon them, and the glory of the Lord shone round about them: and they were sore afraid.

Revelation 4:1

After this I looked, and, behold, a door was opened in heaven: and the first voice which I heard was as it were of a trumpet talking with me; which said, Come up hither, and I will shew thee things which must be hereafter.

Revelation 19:11

And I saw heaven opened, and behold a white horse; and he that sat upon him was called Faithful and True, and in righteousness he doth judge and make war.

Matthew 25:31

When the Son of man shall come in his glory, and all the holy angels with him, then shall he sit upon the throne of his glory:

1 Timothy 3:16

And without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory.

Luke 22:69

Hereafter shall the Son of man sit on the right hand of the power of God.

Hebrews 1:14

Are they not all ministering spirits, sent forth to minister for them who shall be heirs of salvation?

John 10:1

Verily, verily, I say unto you, He that entereth not by the door into the sheepfold, but climbeth up some other way, the same is a thief and a robber.