Mark 10:15
I tell all of you with certainty, whoever doesn't receive the kingdom of God as a little child will never enter it."
Matthew 18:3
Then he said, "I tell all of you with certainty, unless you change and become like little children, you will never get into the kingdom from heaven.
Luke 18:17
I tell all of you with certainty, whoever doesn't receive the kingdom of God as a little child will never get into it at all."
John 3:3-6
Jesus replied to him, "Truly, I tell you emphatically, unless a person is born from above he cannot see the kingdom of God."