It was narrated from Kab bin Ujra:That he was with the Messenger of Allah in Ihram and he suffered an infestation of head lice. The Messenger of Allah commanded him to shave his head and told him: "Fast for three days, or fed six poor persons two Mudds earch, or sacrifice a sheep. Whichever one of these you do will be sufficient for you
Hadith No. 2851
Sunan an Nasai
Gradings:
Abu Ghuddah:
Sahih
Al-Albani:
Sahih
Zubair Ali Zai:
Isnaad Sahih