John 3:3-5 NIV

[3] Jesus replied, “Very truly I tell you, no one can see the kingdom of God unless they are born again.” [4] “How can someone be born when they are old?” Nicodemus asked. “Surely they cannot enter a second time into their mother’s womb to be born!” [5] Jesus answered, “Very truly I tell you, no one can enter the kingdom of God unless they are born of water and the Spirit.