GOD'S WORD® Translation
Then he said to them, "I can guarantee this truth: Unless you change and become like little children, you will never enter the kingdom of heaven.

American Standard Version
and said, Verily I say unto you, Except ye turn, and become as little children, ye shall in no wise enter into the kingdom of heaven.

Berean Study Bible
“Truly I tell you,” He said, “unless you change and become like little children, you will never enter the kingdom of heaven.

Douay-Rheims Bible
And said: Amen I say to you, unless you be converted, and become as little children, you shall not enter into the kingdom of heaven.

English Revised Version
and said, Verily I say unto you, Except ye turn, and become as little children, ye shall in no wise enter into the kingdom of heaven.

King James Bible
And said, Verily I say unto you, Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven.

World English Bible
and said, "Most certainly I tell you, unless you turn, and become as little children, you will in no way enter into the Kingdom of Heaven.

Young's Literal Translation
and said, 'Verily I say to you, if ye may not be turned and become as the children, ye may not enter into the reign of the heavens;

Matthew 18:3 Additional Translations ...