Matthew 18:3 and said, "Truly I say to you, unless you are converted and become like children, you will not enter the kingdom of heaven.

Matthew 19:14 But Jesus said, "Let the children alone, and do not hinder them from coming to Me; for the kingdom of heaven belongs to such as these."

Mark 10:15 "Truly I say to you, whoever does not receive the kingdom of God like a child will not enter it at all."

Luke 18:17 "Truly I say to you, whoever does not receive the kingdom of God like a child will not enter it at all."

1 Corinthians 3:2 I gave you milk to drink, not solid food; for you were not yet able to receive it. Indeed, even now you are not yet able,

1 Corinthians 14:20 Brethren, do not be children in your thinking; yet in evil be infants, but in your thinking be mature.

Ephesians 4:15 but speaking the truth in love, we are to grow up in all aspects into Him who is the head, even Christ, (NASB ©1995)