(8) باب التَّطَوُّعِ عَلَى الرَّاحِلَةِ وَالْوِتْرِ
Narrated Jabir ibn Abdullah:
The Messenger of Allah (ﷺ) sent me on some business, and when I came to him he was praying on (the back of) his riding beast (moving) towards the east and making the prostration lower than the bowing.
Reference: Sunan Abi Dawud 1227
In-book reference: Book 4, Hadith 30
English translation: Book 4, Hadith 1223