John 3

3 Jesus answered, and said to him, Truly, truly, I say to thee, but a man be born again, he may not see the kingdom of God.

4 Nicodemus said to him, How may a man be born, when he is old? whether he may enter again into his mother’s womb, and be born again?

5 Jesus answered, Truly, truly, I say to thee, but a man be born again of water, and of the Holy Ghost, he may not enter into the kingdom of God.