Halakhah sa Job 38:15: Sefer Chasidim

“And he said to him that did the wrong, ‛Wherefore smitest thou thy fellow?’” (Exod. 2:13). He did not hit him, but nevertheless, with the raising of the hand he is called wicked.¹Sanhedrin 58b. Our sages said, “He who strikes his neighbor’s jaw, is regarded as if he had struck the jaw of the Divine Glory.” This means that he who strikes the jaw of an Israelite, as it is written, “And put a knife to thy throat” (Prov. 23:2), is regarded as if he had struck the Divine Glory.²Ibid. He has no remedy but to cut off his hand, as it is written, “And the high arm is broken” (Job 38:15).³Ibid. Therefore you, son of man, beware and guard your soul carefully, not to raise your hand against man or woman whether great or small, but only upon your son to reprove him.⁴Makkoth 8a.
/5/ The ordinance of Rabbi Gershom (960-1040) prohibited polygamy among Jews. And consider this in your heart: in the case of the man who marries two women and transgresses the Ordinance of Rabbi Gershom, the whole world says concerning him, “How impudent is that man, he is worthy to be banished and excommunicated,” all the more so does that person transgress who strikes his neighbor or raises his hand against another, even though the person is not yet thirteen years of age.⁶Mekilta, ed. Lauterbach, Exodus, III, 32.