Weak (da'if) — scholars do not use this report as evidence for rulings.
Narrated Abdullah ibn Abbas: The Messenger of Allah (ﷺ) used to prostrate and sleep (in prostration) and produce puffing sounds (during sleep). Then he would stand and pray and would not perform ablution. I said to him: you prayed but did not perform ablution though you slept (in prostration). He replied: Ablution is necessary for one who sleeps while he is lying down. Uthman and Hannad added: For when he lies down, his joints are relaxed. Abu Dawud said: The statement "ablution is necessary for one who sleeps while one is lying down" is a munkar (rejected) tradition. It has been narrated only by Yazid Abu Khalid al-Dalani, on the authority of Qatadah. And its earlier part has been narrated…