Parallel
Proverbs 27:17
Westminster Leningrad Codex · Berean Standard Bible
בַּרְזֶ֣ל בְּבַרְזֶ֣ל יָ֑חַד וְ֝אִ֗ישׁ יַ֣חַד פְּנֵֽי־ רֵעֵֽהוּ׃
As iron sharpens iron, so one man sharpens another (note: Hebrew sharpens the face of another or sharpens the countenance of a friend).