بُلُوغُ الْمَرَامِ
Bulugh al-Maram 82
The Book of Purification
The Nullification of Wudu
وَلِأَبِي دَاوُدَ أَيْضًا, عَنْ اِبْنِ عَبَّاسٍ مَرْفُوعًا: { إِنَّمَا اَلْوُضُوءُ عَلَى مَنْ نَامَ مُضْطَجِعًا } وَفِي إِسْنَادِهِ ضَعْفٌ أَيْضً ا [1] .
And Ibn ‘Abbas (rad) narrated in a Marfu’ (traceable) Hadith that: “Ablution is necessary for one who sleeps while he is lying flat. [Reported by Abu Da’ud and there is weakness in its chain of narrators].
Bulugh al-Maram, 82