Jesus answered,
Verily, verily, I say unto you, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God.
All Commentaries on John 3:5 Go To John 3
On Re-Baptism (Anonymous)
AD 300
Which comes to this result, that the Lord has taught us most plainly by them the liberty and power of the Holy Spirit, approaching of His own will, saying, "The Spirit breathes where He will; and thou hearest His voice, and knowest not whence He cometh or whither He goeth."