I saw the Messenger of Allah ﷺ pray both barefoot and wearing sandals, fast while traveling and break his fast, drink standing and sitting, and turn away after prayer to his right and to his left.
رأيت رسول الله ﷺ يصلي حافيا وناعلا، ويصوم في السفر ويفطر، ويشرب قائما وقاعدا، وينصرف عن يمينه وعن شماله.
Ahmad narrated it (6679, 6928, 7012) through several routes, from Husayn al-Muallim, from Amr bin Shuayb, from his father, from his grandfather, and he related it. Its isnad is hasan because of Amr bin Shuayb.