De 14:1, 2. GOD'S PEOPLE MUST NOT DISFIGURE THEMSELVES IN MOURNING.

      1. ye shall not cut yourselves . . . for the dead--It was a common practice of idolaters, both on ceremonious occasions of their worship (1Ki 18:28), and at funerals (compare Jer 16:6; 41:5), to make ghastly incisions on their faces and other parts of their persons with their finger nails or sharp instruments. The making a large bare space between the eyebrows was another heathen custom in honor of the dead (see on Le 19:27, 28; Le 21:5). Such indecorous and degrading usages, being extravagant and unnatural expressions of hopeless sorrow (1Th 4:13), were to be carefully avoided by the Israelites, as derogatory to the character, and inconsistent with the position, of those who were the people of God [De 14:2].

JFB.