'Abdur Rahman bin 'Auf (RAA) narrated regarding the story of the killing of Abu Jahl,'..they both hastened to him with their swords till they killed him. Afterwards, they went to the Prophet and informed him (of what they had done). The Messenger of Allah (ﷺ) asked them, "Which of you killed him? Have you wiped your swords?" They said:
'No.' The Prophet then looked at the swords and said, "Both of you killed him." He then ordained that the belongings (weapons, shields etc..) of Abu Jahl should go to Mu 'adh bin 'Amro bin al-Jamuh.' Agreed upon.
English reference: Book 11, Hadith 1320
Arabic reference: Book 11, Hadith 1293