John 3
3 Ref Jesus said to him, Truly, I say to you, Without a new birth no man is able to see the kingdom of God.
4 Ref Nicodemus said to him, How is it possible for a man to be given birth when he is old? Is he able to go into his mother's body a second time and come to birth again?
5 Ref Jesus said in answer, Truly, I say to you, If a man's birth is not from water and from the Spirit, it is not possible for him to go into the kingdom of God.