John 3

3 Jesus answered and said unto him, Verily, verily, I say unto thee, Except a person be born again from above, he cannot see the kingdom of God.

4 Nicodemus said unto him, How can a man be born when he is old? Can he enter the second time into his mother’s womb and be born?

5 Jesus answered, Verily, verily, I say unto thee, Unless a man is born of water and of the Spirit, he cannot enter into the kingdom of God.