Charles Ellicott Commentary Proverbs 27:2

"Let another man praise thee, and not thine own mouth; A stranger, and not thine own lips." — Proverbs 27:2 (ASV)

Let another man (zar) praise you ... a stranger (nokhrî).—As to the difference between these words, see above on Proverbs 2:16. A higher consideration than this is suggested in 2 Corinthians 10:18.