Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
bukhari:1818 – Muḥammad b. Yūsuf > And Rqāʾ > Ibn Abū Najīḥ > Mujāhid > ʿAbd al-Raḥman b. Abū Laylá > Kaʿb b. ʿUjrah

Messenger of Allah ﷺ saw him (i.e. Ka'b) while the lice were falling on his face.  

البخاري:١٨١٨ – وَعَنْ مُحَمَّدِ بْنِ يُوسُفَ حَدَّثَنَا وَرْقَاءُ عَنِ ابْنِ أَبِي نَجِيحٍ عَنْ مُجَاهِدٍ أَخْبَرَنَا عَبْدُ الرَّحْمَنِ بْنُ أَبِي لَيْلَى عَنْ كَعْبِ بْنِ عُجْرَةَ ؓ

أَنَّ رَسُولَ اللَّهِ ﷺ رَآهُ وَقَمْلُهُ يَسْقُطُ عَلَى وَجْهِهِ مِثْلَهُ