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- The ruling on this ablution:
It is not obligatory; rather, it is an emphatically recommended practice, as indicated by the hadith in which ʿUmar asked the Messenger of Allah, peace and blessings be upon him, “May one of us lie down to sleep while in a state of major ritual impurity?” He replied, “Yes—let him perform ablution if he wishes.” 2
(2) Ibn Hibban records it in his Sahih, no. 232 of Mawarid, through his teacher Ibn Khuzaymah; al-Hafiz (Ibn Hajar) likewise assigns it to Ibn Khuzaymah’s Sahih in al-Talkhis, as noted above, and then adds:
١١- حكم هذا الوضوء:
وليس ذلك على الوجوب وإنما للاستحباب المؤكد لحديث عمر أنه سأل رسول الله ﷺ: أينام أحدنا وهو جنب؟ فقال:
"نعم ويتوضأ إن شاء" ٢.
٢ رواه ابن حبان في "صحيحه" ٢٣٢- موارد عن شيخه ابن خزيمة وإلى "صحيحه" عزاه الحافظ في "التلخيص" كما تقدم قريبا ثم قال الحافظ:=