Do these vermins trouble you? I said: Yes. Thereupon he said: Then shave your head; and it was in connection with me that this verse was revealed:" Whoever among you is sick or has an ailment of the head, he (may effect) a compensation by fasting or alms or a sacrifice". He (the Holy Prophet, therefore) said to me: Observe fast for three days or give a quantity of alms enough to feed six needy persons or offer sacrifice (of an animal) that is available.  

أَنَّ رَسُولَ اللَّهِ ﷺ وَقَفَ عَلَيْهِ وَرَأْسُهُ يَتَهَافَتُ قَمْلاً فَقَالَ أَيُؤْذِيكَ هَوَامُّكَ قُلْتُ نَعَمْ قَالَ فَاحْلِقْ رَأْسَكَ قَالَ فَفِيَّ نَزَلَتْ هَذِهِ الآيَةُ { فَمَنْ كَانَ مِنْكُمْ مَرِيضًا أَوْ بِهِ أَذًى مِنْ رَأْسِهِ فَفِدْيَةٌ مِنْ صِيَامٍ أَوْ صَدَقَةٍ أَوْ نُسُكٍ} فَقَالَ لِي رَسُولُ اللَّهِ ﷺ صُمْ ثَلاَثَةَ أَيَّامٍ أَوْ تَصَدَّقْ بِفَرَقٍ بَيْنَ سِتَّةِ مَسَاكِينَ أَوِ انْسُكْ مَا تَيَسَّرَ  

[Machine] The Prophet ﷺ stopped at Al-Hudaybiyah, and as he did, lice were crawling on his head. He asked, "Do your lice harm you?" I replied, "Yes." He then said, "Shave your head." In the Quran, Allah said, "And whoever among you is ill or has an ailment of the head, then a ransom of fasting [three days], or charity or sacrifice [is required]" (2:196). The Messenger of Allah ﷺ commanded me to observe fasting for three days, or give charity, or make a sacrifice according to my capability.  

أَنَّ النَّبِيَّ ﷺ وَقَفَ عَلَيْهِ بِالْحُدَيْبِيَةِ قَالَ وَرَأْسُهُ يَتَهَافَتُ قَمْلًا قَالَ أَيُؤْذِيكَ هَوَامُّكَ ؟ قَالَقُلْتُ نَعَمْ قَالَ فَاحْلِقْ رَأْسَكَ قَالَ فِيَّ نَزَلَتْ {فَمَنْ كَانَ مِنْكُمْ مَرِيضًا أَوْ بِهِ أَذًى مِنْ رَأْسِهِ فَفِدْيَةٌ مِنْ صِيَامٍ أَوْ صَدَقَةٍ أَوْ نُسُكٍ} [البقرة 196] قَالَ فَأَمَرَنِي رَسُولُ اللهِ ﷺ فَقَالَ صُمْ ثَلَاثَةَ أَيَّامٍ أَوْ تَصَدَّقْ بِفِرْقٍ بَيْنَ سِتَّةٍ أَوْ بِنُسُكٍ مَا تَيَسَّرَ  

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