Narrated Abdullah ibn Masud: I passed when Abu Jahl had fallen as his foot was struck (with the swords). I said: O enemy of Allah, Abu Jahl, Allah has disgraced a man who was far away from His mercy. I did not fear him at that moment. He replied: It is most strange that a man has been killed by his people. I struck him with a blunt sword. But it did not work, and then his sword fell down from his hand, I struck him with it until he became dead.
Hadith Referenceسنن ابي داود / كتاب الجهاد / 2709
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:ضعيف, إسناده ضعيف, نسائي في الكبريٰ (8670), أبو إسحاق السبيعي عنعن وأبو عبيدة عن أبيه : منقطع, وحديث البخاري (39613963) ومسلم (1800) يغني عنه, انوار الصحيفه، صفحه نمبر 98
Benefits and Issues: Ibn Mas'ud radi Allahu anhu benefited from the sword of the disbeliever himself and killed him with it. And this benefit was taken before the distribution, which was entirely appropriate. See the brief account of Abu Jahl earlier in hadith 680.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 2709