not make baldness: This custom is also called rounding the corners of the head (Leviticus 19:27), and seems to have been performed in honour of some idol. Leviticus 10:6, Leviticus 19:27-28; Deuteronomy 14:1; Isaiah 15:2, Isaiah 22:12; Jeremiah 16:6, Jeremiah 48:37; Ezekiel 44:20; Amos 8:10; Micah 1:16
the corner: The Hebrew peath zakon:, may denote the whiskers; as the Syriac phatho: signifies. These are by the Arabs, according to Niebuhr, still cut entirely off, or worn quite short; and hence they are called by Jeremiah, χφεφι τΰδ:, those with cropped whiskers. Perhaps some superstition, of which we are ignorant, was connected with this; but whether or not, it was the object of Moses to keep the Israelites distinct from other nations.