Musnad Ahmad 3878

It was narrated that 'Abdullah bin Mas'ood (رضي الله عنه) said: On the day of Badr we were three men to one camel, and Abu Lubabah and 'Ali bin Abi Talib were the two who rode with the Messenger of Allah (ﷺ). It was the turn of the Messenger of Allah (ﷺ) to walk, and they said: We will walk and let you ride. He said: "You are not stronger than me and I am not in Iess need of reward than you."