John 6:62
"What and if ye shall see the Son of man ascend up where he was before?"
Cross References (ranked by relevance)
And no man hath ascended up to heaven, but he that came down from heaven, even the Son of man which is in heaven.
So then after the Lord had spoken unto them, he was received up into heaven, and sat on the right hand of God.
And it came to pass, while he blessed them, he was parted from them, and carried up into heaven.
And when he had spoken these things, while they beheld, he was taken up; and a cloud received him out of their sight.
Who is gone into heaven, and is on the right hand of God; angels and authorities and powers being made subject unto him.
I came forth from the Father, and am come into the world: again, I leave the world, and go to the Father.
And now I am no more in the world, but these are in the world, and I come to thee. Holy Father, keep through thine own name those whom thou hast given me, that they may be one, as we are.
Labour not for the meat which perisheth, but for that meat which endureth unto everlasting life, which the Son of man shall give unto you: for him hath God the Father sealed.