Sunan Abi Dawud, Book 1, Hadith 28 (USC-MSA) ⓘ

Narrated A Man from the Companions: Humayd al-Himyari said: I met a man (Companion of the Prophet) who remained in the company of the Prophet just as AbuHurayrah remained in his company. He then added: The Messenger of Allah forbade that anyone amongst us should comb (his hair) every day or urinate in the place where he takes a bath.

حَدَّثَنَا أَحْمَدُ بْنُ يُونُسَ، حَدَّثَنَا زُهَيْرٌ، عَنْ دَاوُدَ بْنِ عَبْدِ اللَّهِ، عَنْ حُمَيْدٍ الْحِمْيَرِيِّ، - وَهُوَ ابْنُ عَبْدِ الرَّحْمَنِ - قَالَ لَقِيتُ رَجُلاً صَحِبَ النَّبِيَّ صلى الله عليه وسلم كَمَا صَحِبَهُ أَبُو هُرَيْرَةَ قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ يَمْتَشِطَ أَحَدُنَا كُلَّ يَوْمٍ أَوْ يَبُولَ فِي مُغْتَسَلِهِ ‏.‏