Ka'b b. 'Ujra (Allah be pleased with him) reported that the Apostle of Allah ﷺ happened to pass by him at Hudaibiya before entering Mecca in a state of Ibrim and he (Ka'b) was kindling fire under the cooking pot and virmins were creeping on his (Kalb's) face. Thereupon (the Holy Prophet) said: Dothese vermins trouble you? He (Ka'b) said: Yes. The Messenger of Allah ﷺ said: Shave your head and give some quantity of food enough to feed six needy persons (faraq is equal to three sa's), or observe fast for three days or offer sacri- fice of a sacrificial animal. Ibn Najih (one of the narrators) said:" Or sacrifice a goat."

وَحَدَّثَنَا مُحَمَّدُ بْنُ أَبِي عُمَرَ، حَدَّثَنَا سُفْيَانُ، عَنِ ابْنِ أَبِي نَجِيحٍ، وَأَيُّوبَ، وَحُمَيْدٍ، وَعَبْدِ، الْكَرِيمِ عَنْ مُجَاهِدٍ، عَنِ ابْنِ أَبِي لَيْلَى، عَنْ كَعْبِ بْنِ عُجْرَةَ، - رضى الله عنه - أَنَّ النَّبِيَّ ﷺ مَرَّ بِهِ وَهُوَ بِالْحُدَيْبِيَةِ قَبْلَ أَنْ يَدْخُلَ مَكَّةَ وَهُوَ مُحْرِمٌ وَهُوَ يُوقِدُ تَحْتَ قِدْرٍ وَالْقَمْلُ يَتَهَافَتُ عَلَى وَجْهِهِ فَقَالَ " أَيُؤْذِيكَ هَوَامُّكَ هَذِهِ " . قَالَ نَعَمْ . قَالَ " فَاحْلِقْ رَأْسَكَ وَأَطْعِمْ فَرَقًا بَيْنَ سِتَّةِ مَسَاكِينَ - وَالْفَرَقُ ثَلاَثَةُ آصُعٍ - أَوْ صُمْ ثَلاَثَةَ أَيَّامٍ أَوِ انْسُكْ نَسِيكَةً " . قَالَ ابْنُ أَبِي نَجِيحٍ " أَوِ اذْبَحْ شَاةً " .