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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
suyuti:7698a –
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السيوطي:٧٦٩٨a –

"إِنَّمَا الوُضُوءُ عَلَى مَن اضْطَجعَ ".  

[طب] الطبرانى في الكبير عن أَبى أمامة

See similar narrations below:

Collected by Ṭabarānī
tabarani:7948 – Aḥmad b. ʿAlī al-Qāḍī al-Ḥimṣī > Abū Mūsá al-Harawī > ʿAṭāʾ b. Jabalah > al-Aʿmash > Jaʿfar b. al-Zubayr > al-Qāsim > Abū Umāmah

[Machine] That the Prophet ﷺ slept until he snored, then he said, "Perform ablution upon those who sleep."  

الطبراني:٧٩٤٨ – حَدَّثَنَا أَحْمَدُ بْنُ عَلِيٍّ الْقَاضِي الْحِمْصِيُّ ثنا أَبُو مُوسَى الْهَرَوِيُّ ثنا عَطَاءُ بْنُ جَبَلَةَ عَنِ الْأَعْمَشِ عَنْ جَعْفَرِ بْنِ الزُّبَيْرِ عَنِ الْقَاسِمِ عَنْ أَبِي أُمَامَةَ

أَنَّ النَّبِيَّ ﷺ نَامَ حَتَّى نَفَخَ ثُمَّ قَالَ «الْوُضُوءُ عَلَى مَنِ اضْطَجَعَ»