'Little Ones' in the Bible

And whoever may give to drink one of these little ones merely a cold cup in the name of a disciple, truly I say to you he will, no, not lose his reward.

But whoever may cause one of these little ones who believe in me to stumble, it is advantageous for him that a donkey-powered millstone were hanged on his neck, and he were drowned in the depth of the sea.

See that ye not disparage one of these little ones, for I say to you, that in the heavens their agents do always behold the face of my Father in the heavens.

So, it is not a purpose before your Father in the heavens, that one of these little ones should perish.