صحيح ابن خزيمه
Sahih Ibn Khuzaymah
جُمَّاعُ أَبْوَابِ ذِكْرِ الْمَاءِ الَّذِي لَا يَنْجُسُ، وَالَّذِي يَنْجُسُ إِذَا خَالَطَتْهُ نَجَاسَةٌ
Chapters on Water that is Pure and Impure
(85) بَابُ الدَّلِيلِ عَلَى أَنَّ سُؤْرَ الْحَائِضِ لَيْسَ بِنَجَسٍ،
Chapter 85: Evidence that the leftover water of a menstruating woman is not impure
Hadith Number: Q110
وإباحة الوضوء والغسل به، إذ هو طاهر غير نجس، إذ لو كان سؤر حائض نجسا لما شرب النبي صلى الله عليه وسلم ماء نجسا غير مضطر إلى شربه
And performing ablution and ghusl with it is permissible because it is pure, not impure, because if the leftover water of a menstruating woman was impure, then the Prophet (peace be upon him) would not have drunk the impure water, especially when he (peace be upon him) was not even compelled to drink it.
تخریج الحدیث:
Hadith Number: 110
نا يوسف بن موسى ، نا جرير ، عن مسعر بن كدام ، عن المقدام بن شريح ، عن ابيه ، عن عائشة ، قالت:" كان رسول الله صلى الله عليه وسلم يؤتى بالإناء فابدا فاشرب وانا حائض، ثم ياخذ الإناء فيضع فاه على موضع في، وآخذ العرق فاعضه، ثم يضع فاه على موضع في" . نا سلم بن جنادة ، نا وكيع ، عن مسعر ، وسفيان ، عن المقدام بن شريح ، بهذا الإسناد نحوه
Sayyidah Aisha (may Allah be pleased with her) narrates that when a (drink) vessel was brought to the Messenger of Allah (peace and blessings be upon him), I would begin drinking from it even though I was menstruating. Then he would take the vessel and place his mouth where I had placed mine (and drink from it). And when (eating food) I would take a bone and gnaw meat from it—then (the Messenger of Allah would take that bone and) place his mouth where I had placed mine (and eat from it). The Imam (author) says: Salm bin Junadah has also narrated a similar report to us with this same chain.
تخریج الحدیث: