Proverbs 22:6
Train up a child in the way he should go;
even when he is old he will not depart from it.
Matthew 18:1-5
At that time the disciples came to Jesus, saying, “Who is the greatest in the kingdom of heaven?” And calling to him a child, he put him in the midst of them and said, “Truly, I say to you, unless you turn and become like children, you will never enter the kingdom of heaven. Whoever humbles himself like this child is the greatest in the kingdom of heaven. “Whoever receives one such child in my name receives me.
English Standard Version (ESV)
The Holy Bible, English Standard Version. ESV® Text Edition: 2016. Copyright © 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.