The Prophet ﷺ came to me at the time of Al-Hudaibiya Pledge while lice were falling on my face. He said, "Are the lice of your head troubling you?" I said, "Yes." He said, "Shave your head and fast for three days, or feed six poor persons, or slaughter a sheep as sacrifice." (The sub-narrator, Aiyub said, "I do not know with which of these three options he started.") (Using translation from Bukhārī 4190)   

أَتَى عَلَيَّ رَسُولُ اللهِ ﷺ زَمَنَ الْحُدَيْبِيَةِ وَأنا أُوقِدُ تَحْتَ قِدْرٍ وَالْقَمْلُ يَتَنَاثَرُ عَلَى جَبْهَتِي أَوْ حَاجِبَيَّ فَقَالَ «أَتُؤْذِيكَ هَوَامُّكَ؟» فَقُلْتُ نَعَمْ قَالَ «فَاحْلِقْ رَأْسَكَ وَانْسُكْ نَسِيكَةً أَوْ صُمْ ثَلَاثَةَ أَيَّامٍ أَوْ أَطْعِمْ سِتَّةَ مَسَاكِينَ» قَالَ أَيُّوبُ لَا أَدْرِي بِأَيِّهِنَّ بَدَأَ  

[Machine] "Do your desires harm you?" I said yes. "So he commanded me to fast or give charity or offer sacrifices." Ibn 'Awn explained it to me, but I did not memorize it. So I asked Ayyub, and he said fasting for three days, giving charity to six poor people, and offering sacrifices as much as you can afford.  

«أَتُؤْذِيكَ هَوَامُّكَ؟» فَقُلْتُ نَعَمْ «فَأَمَرَنِي بِصِيَامٍ أَوْ صَدَقَةٍ أَوْ نُسُكٍ» قَالَ ابْنُ عَوْنٍ فَفَسَّرَهُ لِي مُجَاهِدٌ فَلَمْ أَحْفَظْهُ فَسَأَلْتُ أَيُّوبَ فَقَالَ الصِّيَامُ ثَلَاثَةُ أَيَّامٍ وَالصَّدَقَةُ عَلَى سِتَّةِ مَسَاكِينَ وَالنُّسُكُ مَا اسْتَيْسَرَ  

Messenger of Allah ﷺ stood beside me at Al-Hudaibiya and the lice were falling from my head in great number. He asked me, "Have your lice troubled you?" I replied in the affirmative. He ordered me to get my head shaved. Kaʿb added, "This Holy Verse:--'And if any of you is ill, or has ailment in his scalp (2.196), etc. was revealed regarding me. "The Prophet ﷺ then ordered me either to fast three days, or to feed six poor persons with one Faraq (three Sas) (of dates), or to slaughter a sheep, etc. (sacrifice) whatever was available. (Using translation from Bukhārī 1815)   

قَالَ وَقَفَ عَلَيَّ رَسُولُ اللهِ ﷺ بِالْحُدَيْبِيَةِ وَرَأْسِي يَتَهَافَتُ قَمْلًا فَقَالَ «أَتُؤْذِيكَ هَوَامُّكَ؟» قُلْتُ نَعَمْ يَا رَسُولَ اللهِ قَالَ «فَاحْلِقْ رَأْسَكَ» وَأُنْزِلَتْ هَذِهِ الْآيَةُ {فَمَنْ كَانَ مِنْكُمْ مَرِيضًا أَوْ بِهِ أَذًى مِنْ رَأْسِهِ فَفِدْيَةٌ مِنْ صِيَامٍ أَوْ صَدَقَةٍ أَوْ نُسُكٍ} [البقرة 196] قَالَ فَأَمَرَنِي رَسُولُ اللهِ ﷺ قَالَ صُمْ ثَلَاثَةَ أَيَّامٍ أَوْ تَصَدَّقْ بِفَرَقٍ بَيْنَ سِتَّةٍ أَوْ شَاةٍ مَا تَيَسَّرَ قَالَ وَأَنْزِلَ اللهُ فِيهِ هَذَا  

“I sat with Ka’b bin ‘Ujrah in the mosque and asked him about this Verse: ‘He must pay a compensation of either fasting (three days) or giving charity (feeding six poor persons) or offering sacrifice (one sheep).’ [2:196] Ka’b said: it was revealed concerning me. I had trouble with my head, so I was carried to the Messenger of Allah ﷺ, with lice crawling on my face. He said: ‘I did not think that you were suffering as much as I see. Do you have a sheep?’ I said: ‘No.’ Then this Verse was revealed: “He must pay a Fidyah (ransom) of either fasting (three days) or giving Sadaqah (charity – feeding six poor persons) or offering sacrifice (one sheep).” [2:196] He said: ‘Fasting is three days, charity is to be given to six poor persons, giving each one half of a Sa’ of food, and the sacrifice is a sheep.’” (Using translation from Ibn Mājah 3079)   

كَعْبٌ فِيَّ نَزَلَتْ وَكَانَ بِي أَذًى مِنْ رَأْسِي فَحُمِلْتُ إِلَى رَسُولِ اللهِ ﷺ وَالْقَمْلُ يَتَنَاثَرُ عَلَى وَجْهِي فَقَالَ «مَا كُنْتُ أَرَى أَنَّ الْجَهْدَ يَبْلُغُ مِنْكَ مَا أَرَى أَتَجِدُ شَاةً؟» قَالَ لَا قَالَ فَنَزَلَتْ هَذِهِ الْآيَةُ {فَفِدْيَةٌ مِنْ صِيَامٍ أَوْ صَدَقَةٍ أَوْ نُسُكٍ} [البقرة 196] فَالصَّوْمُ ثَلَاثَةُ أَيَّامٍ وَالصَّدَقَةُ عَلَى سِتَّةِ مَسَاكِينَ لِكُلِّ مِسْكِينٍ نِصْفُ صَاعٍ مِنَ طَعَامٍ فِي حَدِيثِ ابْنِ بَشَّارٍ وَالنُّسُكُ شَاةٌ