John 3:3-5

3Jesus replied, ‘I tell you this: Unless a person is born from above, they cannot understand the kingdom of God.’

4Nicodemus asked, ‘How can a man be born when he is old? He cannot return into his mother's body. He cannot be born a second time.’

5Jesus explained, ‘I tell you this: Unless a person is born by water and by God's Spirit, he cannot come into the kingdom of God.