Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bayhaqi:595Abū Ḥāzim al-Ḥāfiẓ > Abū Aḥmad al-Ḥāfiẓ > Abū al-Qāsim al-Baghawī > Abū Bakr b. Abū Shaybah > Wakīʿ > Mughīrah b. Ziyād > ʿAṭāʾ > Ibn ʿAbbās Lam Yrfaʿh > Man Nām Wahū Jālis Falā Wuḍūʾ ʿAlayh

[Machine] Whoever falls asleep while sitting does not need to perform ablution, but if they lie down to sleep, they must perform ablution. This narration has been reported from Zaid ibn Thabit, Abu Hurairah, and Abu Umamah. Some of our companions argued with evidence  

البيهقي:٥٩٥أَخْبَرَنَا أَبُو حَازِمٍ الْحَافِظُ أنا أَبُو أَحْمَدَ الْحَافِظُ أنا أَبُو الْقَاسِمِ الْبَغَوِيُّ نا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ نا وَكِيعٌ عَنْ مُغِيرَةَ بْنَ زِيَادٍ عَنْ عَطَاءٍ عَنِ ابْنِ عَبَّاسٍ لَمْ يرْفَعْهُ قَالَ

مَنْ نَامَ وَهُوَ جَالِسٌ فَلَا وُضُوءَ عَلَيْهِ وَإِنِ اضْطَجَعَ فَعَلَيْهِ الْوُضُوءُ وَرُوُّينَا فِي ذَلِكَ عَنْ زَيْدِ بْنِ ثَابِتٍ وَأَبِي هُرَيْرَةَ وَأَبِي أُمَامَةَ وَاحْتَجَّ بَعْضُ أَصْحَابِنَا بِمَا