John 3

3 Jesus answered and said to him, "Most assuredly I say to you, unless one is born again, he cannot see the kingdom of God."

4 Nicodemus said to Him, "How can a man be born, being old? Can he enter a second time into his mother’s womb and be born?"

5 Jesus answered, "Most assuredly I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God.