Sunan Abi Dawud 24
سنن أبي داود#24Sahihحَدَّثَنَا مُحَمَّدُ بْنُ عِيسَى، حَدَّثَنَا حَجَّاجٌ، عَنِ ابْنِ جُرَيْجٍ، عَنْ حُكَيْمَةَ بِنْتِ أُمَيْمَةَ بِنْتِ رُقَيْقَةَ، عَنْ أُمِّهَا، أَنَّهَا قَالَتْ كَانَ لِلنَّبِيِّ صلى الله عليه وسلم قَدَحٌ مِنْ عَيْدَانٍ تَحْتَ سَرِيرِهِ يَبُولُ فِيهِ بِاللَّيْلِ .
Narrated Umaymah daughter of Ruqayqah: The Prophet (ﷺ) had a wooden vessel under his bed in which he would urinate at night
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Al-AlbaniHasan Sahih
Muhammad Muhyi Al-Din Abdul HamidHasan Sahih
Zubair Ali ZaiIsnaad Hasan
In-book reference: 1:24