'Born again' in the Bible

Jesus answered and said to him, “Truly, truly, I say to you, unless one is born again he cannot see the kingdom of God.”

Do not be amazed that I said to you, ‘You must be born again.’

Blessed be the God and Father of our Lord Jesus Christ, who according to His great mercy has caused us to be born again to a living hope through the resurrection of Jesus Christ from the dead,

for you have been born again not of seed which is perishable but imperishable, that is, through the living and enduring word of God.