Sayyiduna Abdullah bin Unays (may Allah be pleased with him) relates that the Messenger of Allah (peace and blessings be upon him) said: "Who will deal with Sufyan al-Hudhali for me? He satirises me, reviles me and harms me." I said: O Messenger of Allah, I am ready; send me to him. So he (peace and blessings be upon him) sent me to him. When I reached him at night, I entered his house and called out: Where is Sufyan? One of his household looked out and asked: What do you want? I said: I want Sufyan; tell him to come out to me. So Sufyan came out to me and asked: What do you want? I said: I want you to come down with me; I have a coat of mail that I want to show you. He asked: Where is it? I said: Here it is; come down from your tent and come with me so that I may show it to you. So he came out with me. I drew my sword and struck him until he became cold (that is, dead). Then I came to the Messenger of Allah (peace and blessings be upon him) while he (peace and blessings be upon him) was sitting in a gathering, and I told him that I had killed him. The Messenger of Allah (peace and blessings be upon him) had a staff on which he used to lean; he (peace and blessings be upon him) gave it to me and said: "Lean on this, for those who lean on staffs on the Day of Resurrection will be few." The staff remained with him until he passed away, and then it was buried (with him).
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13929