وَعَن أُمَيْمَة بنت رقيقَة
قَالَتْ: كَانَ لِلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَدَحٌ مِنْ عَيْدَانٍ تَحْتَ سَرِيرِهِ يَبُولُ فِيهِ بِاللَّيْلِ
The Prophet (sallallahu alayhi wa sallam) had a wooden vessel under his bed in which he passed water at night. Abu Dawud and Nasai transmitted it.
Mishkat al-Masabih 338, Book 4, Purification, Hadith 74. 1 min read