صحيح البخاري Sahih Bukhari كتاب الوضوء The Book of Wudu (Ablution)
بَابُ وَضْعِ الْمَاءِ عِنْدَ الْخَلاَءِ:

(10) Chapter. Providing water at lavatories (for washing the private parts after answering the call of nature).

1 hadith
Hadith 143
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ ، قَالَ : حَدَّثَنَا هَاشِمُ بْنُ الْقَاسِمِ ، قَالَ : حَدَّثَنَا وَرْقَاءُ ، عَنْ عُبَيْدِ اللَّهِ بْنِ أَبِي يَزِيدَ ، عَنِ ابْنِ عَبَّاسٍ ، " أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ دَخَلَ الْخَلَاءَ ، فَوَضَعْتُ لَهُ وَضُوءًا ، قَالَ : مَنْ وَضَعَ هَذَا ؟ فَأُخْبِرَ ، فَقَالَ : اللَّهُمَّ فَقِّهْهُ فِي الدِّينِ " .
Narrated Ibn `Abbas: Once the Prophet entered a lavatory and I placed water for his ablution. He asked, "Who placed it?" He was informed accordingly and so he said, "O Allah! Make him (Ibn `Abbas) a learned scholar in religion (Islam).
Hadith Reference Sahih Bukhari / The Book of Wudu (Ablution) / Hadith: 143
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة