It was said, "Messenger of Allah, your freed slave so-and-so has been martyred."He replied, "Not at all. I saw him wrapped in a cloak he had stolen from the spoils on such-and-such a day."
حدثنا وكيع حدثنا الحكم بن عطية عن أبي المخيس اليشكري قال سمعت
قيل يا رسول الله قد استشهد مولاك فلان قال كلا إني رأيت عليه عباءة غلها يوم كذا وكذا
Its isnad is hasan because of Abu Muays, and the hadith was mentioned earlier at 12467 with its wording and chain, so see the biographies of its narrators there.