صحيح ابن خزيمه
Sahih Ibn Khuzaymah
جماع أبواب غسل التطهير والاستحباب من غير فرض ولا إيجابChapters on Ghusl for Purification (Non-Obligatory)
(200) بَابُ ذِكْرِ الدَّلِيلِ عَلَى أَنَّ اغْتِسَالَ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مِنَ الْإِغْمَاءِ لَمْ يَكُنِ اغْتِسَالَ فَرْضٍ وَوُجُوبٍ،Chapter 200: Evidence that the Prophet’s bath after fainting was not obligatory
Hadith Q258
وَإِنَّمَا اغْتَسَلَ اسْتِرَاحَةً مِنَ الْغَمِّ الَّذِي أَصَابَهُ فِي الْإِغْمَاءِ لِيُخَفِّفَ بَدَنَهُ وَيَسْتَرِيحَ.
Rather, the Prophet ﷺ performed ghusl to find relief from the distress that befell him in a state of unconsciousness, so that his blessed body would become balanced and calm.
