Ezekiel 44:20

Neither shall they shave, &c.— The Jews understand this as an expression of mourning for the dead. The words in the original contain a general prohibition, including the times of mourning, as well as other seasons. St. Jerome supposes, that the Jewish priests were forbidden to shave their heads, in order to distinguish them from several of the heathen priests; particularly the Egyptian priests of Isis and Serapis, who had their heads shaved and uncovered, see Calmet, and Leviticus 10.