What is said regarding the water with which human hair has been washed

Sahih al-Bukhari · Book 4 · Hadith 170

حَدَّثَنَا مَالِكُ بْنُ إِسْمَاعِيلَ، قَالَ حَدَّثَنَا إِسْرَائِيلُ، عَنْ عَاصِمٍ، عَنِ ابْنِ سِيرِينَ، قَالَ قُلْتُ لِعَبِيدَةَ عِنْدَنَا مِنْ شَعَرِ النَّبِيِّ صلى الله عليه وسلم أَصَبْنَاهُ مِنْ قِبَلِ أَنَسٍ، أَوْ مِنْ قِبَلِ أَهْلِ أَنَسٍ فَقَالَ لأَنْ تَكُونَ عِنْدِي شَعَرَةٌ مِنْهُ أَحَبُّ إِلَىَّ مِنَ الدُّنْيَا وَمَا فِيهَا‏.‏

Narrated Ibn Seereen: I said to `Abida, "I have some of the hair of the Prophet (ﷺ) which I got from Anas or from his family." `Abida replied. "No doubt if I had a single hair of that it would have been dearer to me tha…

Sahih al-Bukhari · Book 4 · Hadith 171

حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ الرَّحِيمِ، قَالَ أَخْبَرَنَا سَعِيدُ بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنَا عَبَّادٌ، عَنِ ابْنِ عَوْنٍ، عَنِ ابْنِ سِيرِينَ، عَنْ أَنَسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم لَمَّا حَلَقَ رَأْسَهُ كَانَ أَبُو طَلْحَةَ أَوَّلَ مَنْ أَخَذَ مِنْ شَعَرِهِ‏.‏

Narrated Anas: When Allah's Messenger (ﷺ) got his head shaved, Abu- Talha was the first to take some of his hair.