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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:2922 – Muḥammad b. Bashhār > Ghundar > Shuʿbah > Qatādah

(Wearing of silk) was allowed to them (i.e. ʿAbdurRahman and Az-Zubair) because of the itching they suffered from.  

البخاري:٢٩٢٢ – حَدَّثَنِي مُحَمَّدُ بْنُ بَشَّارٍ حَدَّثَنَا غُنْدَرٌ حَدَّثَنَا شُعْبَةُ سَمِعْتُ قَتَادَةَ

عَنْ أَنَسٍ رَخَّصَ أَوْ رُخِّصَ لِحِكَّةٍ بِهِمَا