It is narrated from Sayyiduna Awf bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) did not take the khumus (one-fifth) from the salab (the slain man's gear), and that a madadi (a man who had come as reinforcement) was their companion in the Battle of Mu'tah; then he mentioned the whole hadith.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الفيء والغنيمة / 12785