Hadith 1:28
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 (ﷺ) just as AbuHurayrah remained in his company. He then added: The Messenger of Allah (ﷺ) 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
Original Reference: Sunan Abi Dawud 28