C. F. Keil and Franz Delitzsch on Leviticus 21:16-18

Lev 21:16-18

Directions for the sons (descendants) of Aaron who were afflicted with bodily imperfections. As the spiritual nature of a man is reflected in his bodily form, only a faultless condition of body could correspond to the holiness of the priest; just as the Greeks and Romans required, for the very same reason, that the priests should be ὁλόκληροι, integri corporis (Plato de legg. 6, 759; Seneca excerpt. controv. 4, 2; Plutarch quaest. rom. 73). Consequently none of the descendants of Aaron, “according to their generations,” i.e., in all future generations (see Exo 12:14), who had any blemish (mum, μῶμος, bodily fault) were to approach the vail, i.e., enter the holy place, or draw near to the altar (in the court) to offer the food of Jehovah, viz., the sacrifices. No blind man, or lame man, or charum, κολοβόριν (from κολοβός and ῥίν), naso mutilus (lxx), i.e., one who had sustained any mutilation, especially in the face, on the nose, ears, lips, or eyes, not merely one who had a flat or stunted nose; or שׂרוּע, lit., stretched out, i.e., one who had anything beyond what was normal, an ill-formed bodily member therefore; so that a man who had more than ten fingers and ten toes might be so regarded (2Sa 21:20).