وَ مَرَّ اَلنَّبِيُّ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ عَلَى كَعْبِ بْنِ عُجْرَةَ اَلْأَنْصَارِيِّ وَ هُوَ مُحْرِمٌ وَ قَدْ أَكَلَ اَلْقَمْلُ رَأْسَهُ وَ حَاجِبَيْهِ وَ عَيْنَيْهِ فَقَالَ رَسُولُ اَللَّهِ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ «مَا كُنْتُ أَرَى أَنَّ اَلْأَمْرَ يَبْلُغُ مَا أَرَى» فَأَمَرَهُ فَنَسَكَ عَنْهُ نُسُكاً وَ حَلَقَ رَأْسَهُ بِقَوْلِ اَللَّهِ عَزَّ وَ جَلَّ « فَمَنْ كٰانَ مِنْكُمْ مَرِيضاً أَوْ بِهِ أَذىً مِنْ رَأْسِهِ فَفِدْيَةٌ مِنْ صِيٰامٍ أَوْ صَدَقَةٍ أَوْ نُسُكٍ » فَالصِّيَامُ ثَلاَثَةُ أَيَّامٍ وَ اَلصَّدَقَةُ عَلَى سِتَّةِ مَسَاكِينَ لِكُلِّ مِسْكِينٍ صَاعٌ مِنْ تَمْرٍ وَ رُوِيَ «مُدٌّ مِنْ تَمْرٍ وَ اَلنُّسُكُ شَاةٌ لاَ يُطْعَمُ مِنْهَا أَحَدٌ إِلاَّ اَلْمَسَاكِينُ ».
The Prophet (peace and blessings be upon him and his family) passed by Ka'b ibn Ujrah al-Ansari while he was in the state of ihram, and lice had afflicted his head, eyebrows, and eyes. The Messenger of Allah (swt) (peace and blessings be upon him and his family) said: "I did not think the matter would reach the state that I now see." He (saws) then commanded him to perform an expiation on his behalf, and Ka'b shaved his head, following the words of Allah (swt), the Exalted: "But if any of you is ill or has an ailment in his head, [making shaving necessary], then [his ransom is] fasting, or charity, or sacrifice" (Surah Al-Baqarah 2:196). The expiation is: - Fasting for three days. - Giving charity to six needy individuals, with each person receiving a measure (sa') of dates—or, as narrated in another report, a mudd of dates. Sacrificing a sheep, which must only be given to the needy and not eaten by anyone else.