وَعَنِ ابْنِ عَبَّاسٍ
قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِنَّ الْوُضُوءَ عَلَى مَنْ نَامَ مُضْطَجِعًا فَإِنَّهُ إِذَا اضْطَجَعَ اسْتَرْخَتْ مفاصله
Ibn Abbas reported God’s messenger as saying, “Ablution is necessary for one who sleeps lying down, for when he lies down his joints are relaxed.”
Mishkat al-Masabih 298, Book 4, Purification, Hadith 34. 1 min read