صحیح ابن حبان
Ibn Hibban
كتاب الحج
Book of Hajj
باب الكفارة - ذكر البيان بأن المصطفى صلى الله عليه وسلم أمر كعب بن عجرة بالكفارة التي ذكرناها بعد حلقه رأسه
Chapter on Expiation – On Clarifying That the Prophet Commanded Ka’b ibn Ujrah to Offer the Expiation After Shaving His Head
2 hadith
Hadith 3980
Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) narrates: During Hudaybiyyah, the Prophet Muhammad (peace and blessings be upon him) passed by me while I was lighting a fire under my cooking pot (the narrator is unsure about one word here), and lice were falling on my face. The Prophet (peace and blessings be upon him) asked: O Ka'b! Are the lice troubling you? I replied: Yes, O Messenger of Allah! The Prophet (peace and blessings be upon him) said: Shave your head and offer a sacrifice, or fast for three days, or feed six needy people one sa' (measure) each.
Hadith 3981
Sayyiduna Ka'b bin Ujrah narrates a similar narration from the Prophet Muhammad (peace be upon him): however, in this narration, the words are: "You should slaughter a goat."