Narrated 'Abdur-Rahman bin Abi Laila:
from Ka'b bin 'Ujrah who said: "The Messenger of Allah (ﷺ) came to me while I was lighting a fire under a pot, and lice were falling on my face, or on my eye-brows. He said: 'Are your lice bothering you?'" [He said:] "I said: 'Yes.' He said: 'Then shave your head and offer a sacrifice, or fast three days, or feed six needy people.'" Ayyub said: "I do not know which of them he started with." (ES)
English reference (ES): Vol. 5, Book 44, Hadith 2974 (ES)
Arabic reference (ES): Book 47, Hadith 3240 (ES)