صحيح ابن خزيمه
Sahih Ibn Khuzaymah
جُمَّاعُ أَبْوَابِ الْأَفْعَالِ اللَّوَاتِي لَا تُوجِبُ الْوُضُوءَُ
Chapters on Acts Not Requiring Wudu
(32) بَابُ الرُّخْصَةِ فِي تَرْكِ غَسْلِ الْيَدَيْنِ، وَالْمَضْمَضَةِ مِنْ أَكْلِ اللَّحْمِ؛ إِذِ الْعَرَبُ قَدْ تُسَمِّي غَسْلَ الْيَدَيْنِ وُضُوءًا
Chapter on the concession to omit washing hands and rinsing the mouth after eating meat, as Arabs may call washing hands "wudu"
Hadith Number: 44
حدثنا بندار ، حدثنا يحيى بن سعيد ، عن جعفر بن محمد ، عن ابيه ، عن علي بن حسين ، عن زينب ابنة ام سلمة، عن ام سلمة ، ان النبي صلى الله عليه وسلم " اكل كتفا، ثم صلى ولم يمس ماء"
It is narrated from Sayyidah Umm Salamah (may Allah be pleased with her) that the Prophet (peace and blessings of Allah be upon him) ate shoulder meat, then performed prayer and did not touch water (i.e., he neither washed his hands nor rinsed his mouth, etc.).
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