حَدَّثَنِي عَنْ مَالِكٍ، عَنْ حُمَيْدِ بْنِ قَيْسٍ، عَنْ مُجَاهِدٍ أَبِي الْحَجَّاجِ، عَنِ ابْنِ أَبِي لَيْلَى، عَنْ كَعْبِ بْنِ عُجْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ لَهُ ‏"‏ لَعَلَّكَ آذَاكَ هَوَامُّكَ ‏"‏ ‏.‏ فَقُلْتُ نَعَمْ يَا رَسُولَ اللَّهِ ‏.‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ احْلِقْ رَأْسَكَ وَصُمْ ثَلاَثَةَ أَيَّامٍ أَوْ أَطْعِمْ سِتَّةَ مَسَاكِينَ أَوِ انْسُكْ بِشَاةٍ ‏"‏ ‏.‏

Yahya related to me from Malik from Humayd bin Qays from MujahidAbu'l Hajjaj from Ibn Abi Layla from Kab ibn Ujra that the Messengerof Allah, may Allah bless him and grant him peace, said to him,"Perhaps your pests are troubling you?" He replied that indeed theywere, and the Messenger of Allah, may Allah bless him and grant himpeace, said, "Shave your head and fast three days or feed six poor menor sacrifice a sheep." Translation Not Available

Book Ref: Muwatta Imam Malik Book 20 Hadith 944
Web Ref:  Muwatta Imam Malik Book 20 Hadith 247