Sunan Abi Dawud 1856
سنن أبي داود#1856SahihKa’ab bin ‘Ujrah said that the Apostle of Allaah(ﷺ) came upon him (during their stay) at Al Hudaibiyyah. He asked do the insects of your head (lice) annoy you? He said Yes. The Prophet (ﷺ) said Shave your head, then sacrifice a sheep as offering or fast three days or give three sa’s of dates to six poor people
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (1814) Sahih Muslim (1201)
In-book reference: 11:136