Question: where in the bible does it say iron sharpens iron?
Answer: of Proverbs 27:17 Proverbs 27:17, “Iron sharpens iron, and one man sharpens the face his neigh- bor,” is almost universally seen as positive. Some view this maxim as an example of “tough love,” others as a rewording of a verse earlier in this passage, “Faithful are the wounds of a friend” (27:6).