I used to serve the Prophet ﷺ. Whenever he intended to wash himself, he would say: Turn your back towards me, So I would turn my back and hide him. (Once) Hasan or Husayn (may Allah be pleased with them) was brought to him and he passed water on his chest. I came to wash it. He said: It is only the urine of a female which should be washed; the urine of a male should be sprinkled over. 'Abbas (a narrator) said: Yahya b. al-Walid narrated the tradition to us. Abu Dawud said: He (Yahya) is Abu al-Za'ra'. Harun b. Tamim said on the authority of al-Hasan: All sorts of urine are equal.
كُنْتُ أَخْدُمُ النَّبِيَّ ﷺ فَكَانَ إِذَا أَرَادَ أَنْ يَغْتَسِلَ قَالَ وَلِّنِي قَفَاكَ فَأُوَلِّيهِ قَفَاىَ فَأَسْتُرُهُ بِهِ فَأُتِيَ بِحَسَنٍ أَوْ حُسَيْنٍ ؓ فَبَالَ عَلَى صَدْرِهِ فَجِئْتُ أَغْسِلُهُ فَقَالَ يُغْسَلُ مِنْ بَوْلِ الْجَارِيَةِ وَيُرَشُّ مِنْ بَوْلِ الْغُلاَمِ قَالَ عَبَّاسٌ حَدَّثَنَا يَحْيَى بْنُ الْوَلِيدِ