The Prophet ﷺ, when I was suffering from lice, instructed me to shave my head and either fast for three days or feed six poor people, knowing that I had nothing with which to offer a sacrifice.
حدثنا عبد الرحمن بن إبراهيم حدثنا عبد الله بن نافع عن أسامة بن زيد عن محمد بن كعب
أمرني النبي ﷺ حين آذاني القمل أن أحلق رأسي وأصوم ثلاثة أيام أو أطعم ستة مساكين وقد علم أن ليس عندي ما أنسك
[Its isnad is hasan] Tabarani narrated it: 19/158, 159, from the hadith of Ibn Nafi, and Rawh bin Ubada corroborated him in his version, though his hadith is abridged. The hadith has corroborating narrations.