The Book of Purification
1/28. Chapter:
Urinating In a Vessel
Sunan an-Nasai
أَخْبَرَنَا أَيُّوبُ بْنُ مُحَمَّدٍ الْوَزَّانُ، قَالَ حَدَّثَنَا حَجَّاجٌ، قَالَ قَالَ ابْنُ جُرَيْجٍ أَخْبَرَتْنِي حُكَيْمَةُ بِنْتُ أُمَيْمَةَ، عَنْ أُمِّهَا، أُمَيْمَةَ بِنْتِ رُقَيْقَةَ قَالَتْ كَانَ لِلنَّبِيِّ صلى الله عليه وسلم قَدَحٌ مِنْ عَيْدَانٍ يَبُولُ فِيهِ وَيَضَعُهُ تَحْتَ السَّرِيرِ .
It was narrated that Umaimah bint Ruqaiqah said: "The Prophet (ﷺ) had a vessel made from a date tree in which he would urinate and place it under the bed."
Reference : Sunan an-Nasa'i 32In-book reference : Book 1, Hadith 32English translation : Vol. 1, Book 1, Hadith 32