Ka’b bin ‘Ujrah said I had lice in my head when I accompanied the Apostle of Allaah(ﷺ) in the year of Al Hudaibiyyah so much so that I feared about my eyesight. So Allaah, the exalted revealed these verses about me. “And whoever among you is sick or hath an aliment of the head.” The Apostle of Allaah(ﷺ) called me and said “Shave your head and fast three days or give a faraq of raisins to six poor men or sacrifice a goat. So, I shaved my head and sacrificed.