Matthew 18:3
"Truly I tell you," He said, "unless you change and become like little children, you will never enter the kingdom of heaven.

Matthew 19:14
But Jesus said, "Let the little children come to Me, and do not hinder them! For the kingdom of heaven belongs to such as these."

Luke 18:17
Truly I tell you, if anyone does not receive the kingdom of God like a little child, he will never enter it."

1 Corinthians 14:20
Brothers, stop thinking like children. In regard to evil be infants, but in your thinking be mature.

1 Peter 2:2
Like newborn infants, crave pure spiritual milk, so that by it you may grow up in your salvation,