سنن ابن ماجه

It was narrated that ‘Ali bin Abi Talib said: “When Mughirah bin Shu’bah fought alongside the Prophet (ﷺ) he would carry a spear, and when he would come back he would throw his spear down so that someone would pick it up and give it back to him.” ‘Ali said to him: “I will tell the Messenger of Allah (ﷺ) about that.” He (the Prophet (ﷺ)) said: “Do not do that, for it you do that it will not be picked up as a lost item to be returned.”