Nor cut themselves, nor make themselves bald. Both practices are forbidden in the Law (Deuteronomy 14:1; Le 19:28; Deuteronomy 21:5), but the prohibition was at any rate unknown to the masses (see, for the former, Jeremiah 41:5; Jeremiah 47:5; and for the latter, Jeremiah 47:5; Isaiah 22:12, "The Lord Jehovah called … to baldness;" Amos 8:10; Micah 1:16; Ezekiel 7:18).
St. Jerome remarks, and incidentally gives a valuable evidence of the tenacity of primitive customs, "Mos hic fuit apud veteres, et usque hodie in quibusdam permanet Judaerum, ut in luctibus incidant lacertos," etc.