Hadith 11568

Chapter 6

باب 6

(6) باب نواقض الوضوء

(6) Chapter: The Nullification of Wudu
99
وَلِأَبِي دَاوُدَ أَيْضًا, عَنْ اِبْنِ عَبَّاسٍ مَرْفُوعًا: { إِنَّمَا اَلْوُضُوءُ عَلَى مَنْ نَامَ مُضْطَجِعًا } وَفِي إِسْنَادِهِ ضَعْفٌ أَيْضً ا (99) .2 - منكر. رواه أبو داود (202).

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].

Reference: Bulugh al-Maram 82

In-book reference: Book 1, Hadith 99

English translation: Book 1, Hadith 88