Chapter on Causes Requiring Purification
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 1
فَأَمَّا اَلْخَبَرُ اَلَّذِي رَوَاهُ مُحَمَّدُ بْنُ أَحْمَدَ بْنِ يَحْيَى عَنِ اَلْعَبَّاسِ عَنْ أَبِي شُعَيْبٍ عَنْ عِمْرَانَ بْنِ حُمْرَانَ أَنَّهُ سَمِعَ عَبْداً صَالِحاً يَقُولُ:« مَنْ نَامَ وَ هُوَ جَالِسٌ لاَ يَتَعَمَّدُ اَلنَّوْمَ فَلاَ وُضُوءَ عَلَيْهِ».
As for the narration that was reported by Muhammad bin Ahmad bin Yahya, from al-Abbas, from Abu Shuayb, from Imran bin Humran, that he heard the righteous servant of Allah سبحانه وتعالى say:
"Whoever sleeps while sitting, without intending to sleep, then wudu is not required for him."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 6
- Ṣaḥīḥ al-Tahdhīb