Ash-Shama'il Al-Muhammadiyah, Book 54, Hadith 386 (In-Book)

'Aayeshah Radiyallahu 'Anha relates that at the time of the death of Rasulullah Sallallahu'Alayhi Wasallam, she gave him support with her chest, or she said with her lap. He asked for a container to urinate in. He urinated therein. Thereafter he passed away.

حَدَّثَنَا حُمَيْدُ بْنُ مَسْعَدَةَ الْبَصْرِيُّ، قَالَ‏:‏ حَدَّثَنَا سُلَيْمُ بْنُ أَخْضَرَ، عَنِ ابْنِ عَوْنٍ، عَنِ إِبْرَاهِيمَ، عَنِ الأَسْوَدِ، عَنْ عَائِشَةَ، قَالَتْ‏:‏ كُنْتُ مُسْنِدَةً النَّبِيَّ صلى الله عليه وسلم، إِلَى صَدْرِي أَوْ قَالَتْ‏:‏ إِلَى حِجْرِي فَدَعَا بِطَسْتٍ لِيَبُولَ فِيهِ، ثُمَّ بِالَ، فَمَاتَ‏.‏

also referenced under: Book 53, Hadith 369 (English)