בַּרְזֶ֣ל בְּבַרְזֶ֣ל יָ֑חַד וְ֝אִ֗ישׁ יַ֣חַד פְּנֵֽי־רֵעֵֽהוּ׃
Ang bakal ay nagpapatalas sa bakal, at ang tao ay nagpapatalas sa mukha ng kanyang kaibigan.
Taanit
Rabbi Chamma said, (Rabbi) Chanina (said), "What is [the meaning of] what is written (Proverbs 27:17), 'Iron sharpens iron?' To say to you [that] just as [in the case of] iron, one sharpens its fellow; so too two Torah scholars sharpen each other in [matters of] Halacha (law)."