Distribution of the word across the Bible: Exodus (1), Isaiah (1)
Exodus 21:18 — And if men strive together, and one smite another with a stone, or with his fist (בְאֶגְרֹ֑ף), and he die not, but keepeth his bed:
Isaiah 58:4 — Behold, ye fast for strife and debate, and to smite withthefist (בְּאֶגְרֹ֣ף) of wickedness: ye shall not fast as ye do this day, to make your voice to be heard on high.