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1In that hour the disciples came to Jesus, saying, "Who then is greatest in the Kingdom of Heaven?" 2Jesus called a little child to himself, and set him in the midst of them, 3and said, "Most assuredly I tell you, unless you turn, and become as little children, you will in no way enter into the Kingdom of Heaven. 4Whoever therefore will humble himself as this little child, the same is the greatest in the Kingdom of Heaven. 5Whoever will receive one such little child in my name receives me, 6but whoever will cause one of these little ones who believe in me to stumble, it would be better for him that a huge millstone should be hung around his neck, and that he should be sunk in the depths of the sea.
Matthew 18:1-6 (WEB)