Adam Clarke on Ezekiel 16:12

I put a jewel on thy forehead - על אפך al appech, upon thy nose. This is one of the most common ornaments among ladies in the east. European translators, not knowing what to make of a ring in the nose, have rendered it, a jewel on thy forehead or mouth, (though they have sometimes a piece of gold or jewel fastened to the center of their forehead.) I have already spoken of this Asiatic custom, so often referred to in the sacred writings: see Gen 24:22, Gen 24:42; Exo 32:2; Job 42:11; Pro 11:22; Isa 3:21; Hos 2:13.