Musnad Ahmad 32:910

Waki’ narrated to us, al-Hakam ibn ‘Atiyyah narrated to us, from Abu al-Mukhayis al-Yashkuri, who said: I heard Anas ibn Malik saying: It was said: "O Messenger of Allah, has your freed slave so-and-so been martyred?" He said: "No, for I saw upon him a cloak that he had misappropriated on such-and-such a day."