Verily, verily, I say unto thee, We speak that we do know, and testify that we have seen; and ye receive not our witness.
John 3:11
King James Version (public domain)
Traditionally attributed to John · 1st century AD · One of the twelve apostles of Jesus; the "beloved disciple"
Context
9Nicodemus answered and said unto him, How can these things be?
10Jesus answered and said unto him, Art thou a master of Israel, and knowest not these things?
11Verily, verily, I say unto thee, We speak that we do know, and testify that we have seen; and ye receive not our witness.
12If I have told you earthly things, and ye believe not, how shall ye believe, if I tell you of heavenly things?
13And no man hath ascended up to heaven, but he that came down from heaven, even the Son of man which is in heaven.