Deuteronomy 14:1 - Albert Barnes' Notes on the Bible

Make any baldness between your eyes - i. e. by shaving the forepart of the head and the eyebrows. The practices named in this verse were common among the pagan, and seem to be forbidden, not only because such wild excesses of grief (compare 1 Kings 18:28) would be inconsistent in those who as children of a heavenly Father had prospects beyond this world, but also because these usages themselves arose out of idolatrous notions.