Sayyiduna Abdullah bin Abi Awfa رضي الله عنه narrates: Sayyiduna Abdur Rahman bin Awf رضي الله عنه complained to the Prophet صلى الله عليه وسلم about Sayyiduna Khalid bin Walid رضي الله عنه, so the Prophet صلى الله عليه وسلم said: O Khalid! Why did you trouble a person who is among the people of Badr? Even if you spend gold equal to Mount Uhud (in the way of Allah), you will still not reach his deeds. He (Khalid) said: O Messenger of Allah صلى الله عليه وسلم, he was speaking against me, so I replied to him. The Prophet صلى الله عليه وسلم said: Do not trouble Khalid, for he is a sword from among the swords of Allah which Allah has unsheathed against the disbelievers.