Augustine of Hippo, on Prov 27:2

“Let another praise thee, and not thy own mouth: a stranger, and not thy own lips.”

“If I seem arrogant to you, it is for this reason, that I bear testimony to myself. For every person, when he wishes to bear praiseworthy testimony to himself, seems arrogant and proud. So it has been written, "Let not your own mouth praise you, but let the mouth of your neighbor praise you."”

Imported from an open dataset — not yet checked against the printed edition.