Allah's Messenger (ﷺ) stood beside me at Al-Hudaibiya and the lice were falling from my head in greatnumber. He asked me, "Have your lice troubled you?" I replied in the affirmative. He ordered me toget my head shaved. Ka`b added, "This Holy Verse:--'And if any of you is ill, or has ailment in hisscalp (2.196), etc. was revealed regarding me. "The Prophet (ﷺ) then ordered me either to fast three days,or to feed six poor persons with one Faraq (three Sas) (of dates), or to slaughter a sheep, etc.(sacrifice) whatever was available.