The Statement of Allah (The Most High) : "... And whosoever of you is ill or has an ailment in his scalp, (necessitating shaving), he must pay a Fidya ..."

Narrated 'Abdur-Rahman bin Abu Layla:

Ka'b bin 'Ujra said that Allah's Apostle ﷺ said to him (Ka'b), "Perhaps your lice have troubled you?" Ka'b replied, "Yes! O Allah's Apostle." Allah's Apostle ﷺ said, "Have your head shaved and then either fast three days or feed six poor persons or slaughter one sheep as a sacrifice."

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنْ حُمَيْدِ بْنِ قَيْسٍ، عَنْ مُجَاهِدٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبِي لَيْلَى، عَنْ كَعْبِ بْنِ عُجْرَةَ ـ رضى الله عنه ـ عَنْ رَسُولِ اللَّهِ ﷺ أَنَّهُ قَالَ " لَعَلَّكَ آذَاكَ هَوَامُّكَ ". قَالَ نَعَمْ يَا رَسُولَ اللَّهِ. فَقَالَ رَسُولُ اللَّهِ ﷺ " احْلِقْ رَأْسَكَ وَصُمْ ثَلاَثَةَ أَيَّامٍ، أَوْ أَطْعِمْ سِتَّةَ مَسَاكِينَ، أَوِ انْسُكْ بِشَاةٍ ".