Narrated Ibn 'Umar:
We would eat during the time of the Messenger of Allah (ﷺ) while we were walking, and we would drink while we were standing.
[Abu 'Eisa said:] This Hadith is Hasan Sahih Gharib as a narration of 'Ubaidullah bin 'Umar, from Nafi', from Ibn 'Umar. 'Imran bin Hudair reported this Hadith from Abu Al-Bazari, from Ibn 'Umar. Abu Al-Bazari's name is Yazid bin 'Utarid.