question #3 Sahih Muslim 701, Book 6, Hadith 50 : What does this narration indicate about the Prophet’s dedication to voluntary prayers even during journeys?

‘Abdullah b. ‘Amir b. Rabi’a has reported on the authority of his father that he had seen the Messenger of Allah (ﷺ) observing Nafl player at night on a journey on the back of his ride in whichever direction it turned its face.