Narrated Ka`b bin Ujrah: The Prophet (ﷺ) came to me during the period of Al-Hudaibiya, while I was lighting fire underneath a cooking pot and lice were falling down my head. He said, "Do your lice hurt your?" I said, "Yes." He said, "Shave your head and fast for three days or feed six poor persons or slaughter a sheep as a sacrifice:"

Narrated Ka`b bin Ujrah: The Prophet (ﷺ) came to me during the period of Al-Hudaibiya, while I was lighting fire underneath a cooking pot and lice were falling down my head. He said, "Do your lice hurt your?" I said, "Yes." He said, "Shave your head and fast for three days or feed six poor persons or slaughter a sheep as a sacrifice:"

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا حَمَّادٌ، عَنْ أَيُّوبَ، قَالَ سَمِعْتُ مُجَاهِدًا، عَنِ ابْنِ أَبِي لَيْلَى، عَنْ كَعْبٍ، هُوَ ابْنُ عُجْرَةَ قَالَ أَتَى عَلَىَّ النَّبِيُّ صلى الله عليه وسلم زَمَنَ الْحُدَيْبِيَةِ، وَأَنَا أُوقِدُ تَحْتَ بُرْمَةٍ، وَالْقَمْلُ يَتَنَاثَرُ عَنْ رَأْسِي فَقَالَ ‏"‏ أَيُؤْذِيكَ هَوَامُّكَ ‏"‏‏.‏ قُلْتُ نَعَمْ‏.‏ قَالَ ‏"‏ فَاحْلِقْ وَصُمْ ثَلاَثَةَ أَيَّامٍ، أَوْ أَطْعِمْ سِتَّةً، أَوِ انْسُكْ نَسِيكَةً ‏"‏‏.‏ قَالَ أَيُّوبُ لاَ أَدْرِي بِأَيَّتِهِنَّ بَدَأَ‏.‏