Sahih al-Bukhari 4191
Sahih al-Bukhari · Book 64: Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi) · The Ghazwa of Al-Hudaibiya
Narrated Ka`b bin Ujra:
حَدَّثَنِي مُحَمَّدُ بْنُ هِشَامٍ أَبُو عَبْدِ اللَّهِ ، حَدَّثَنَا هُشَيْمٌ ، عَنْ أَبِي بِشْرٍ ، عَنْ مُجَاهِدٍ ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبِي لَيْلَى ، عَنْ كَعْبِ بْنِ عُجْرَةَ ، قَالَ كُنَّا مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم بِالْحُدَيْبِيَةِ وَنَحْنُ مُحْرِمُونَ، وَقَدْ حَصَرَنَا الْمُشْرِكُونَ ـ قَالَ ـ وَكَانَتْ لِي وَفْرَةٌ فَجَعَلَتِ الْهَوَامُّ تَسَّاقَطُ عَلَى وَجْهِي، فَمَرَّ بِي النَّبِيُّ صلى الله عليه وسلم فَقَالَ " أَيُؤْذِيكَ هَوَامُّ رَأْسِكَ ". قُلْتُ نَعَمْ. قَالَ وَأُنْزِلَتْ هَذِهِ الآيَةُ {فَمَنْ كَانَ مِنْكُمْ مَرِيضًا أَوْ بِهِ أَذًى مِنْ رَأْسِهِ فَفِدْيَةٌ مِنْ صِيَامٍ أَوْ صَدَقَةٍ أَوْ نُسُكٍ}
We were in the company of Allah's Messenger (ﷺ) at Al-Hudaibiya in the state of Ihram and the pagans did not allow us to proceed (to the Ka`ba). I had thick hair and lice started falling on my face. The Prophet (ﷺ) passed by me and said, "Are the lice of your head troubling you?" I replied, Yes." (The sub-narrator added, "Then the following Divine Verse was revealed:-- "And if anyone of you is ill or has an ailment in his scalp, (necessitating shaving) must pay a ransom (Fida) of either fasting or feeding the poor, Or offering a sacrifice." (2.196)