John 3:3
3 Jesus answered and said to him, “Truly, truly, I say to you, unless one is born again he cannot see the kingdom of God.”
John 3:5 - 3:6
5 Jesus answered, “Truly, truly, I say to you, unless one is born of water and the Spirit he cannot enter into the kingdom of God. 6 That which has been born of the flesh is flesh, and that which has been born of the Spirit is spirit.