Praise from the mouths of children
The Old Testament
From the mouths of children and infants You have ordained praise on account of Your adversaries, to silence the enemy and avenger.
Psalm 8:2
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In the New Testament
“Do you hear what these children are saying?” they asked. “Yes,” Jesus answered. “Have you never read: ‘From the mouths of children and infants You have ordained praise’?”
Matthew 21:16
BSB
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Read the full text (2 verses)
Out of the mouth of babes and sucklings you have ordained strength (or: praise).
Children in the temple shout 'Hosanna to the Son of David' and the leaders are indignant. Jesus answers with this verse. He follows the Greek translation, and you can see it in the King James: the psalm says strength, Matthew says perfected praise. In Psalm 8 that praise is directed to God himself.