He said that the Messenger of Allah ﷺ used to award an extra share of one-third from the spoils after the fifth had been set aside.
حدثنا محمد بن كثير قال أخبرنا سفيان عن يزيد بن يزيد بن جابر الشامي عن مكحول عن زياد بن جارية التميمي
أنه قال كان رسول الله ﷺ ينفل الثلث بعد الخمس
No references are available.
[Sahih] Ibn Majah narrated it in jihad, the chapter on nafl (extra battle shares), hadith 2851, from the hadith of Sufyan through this route, and Hakim graded it sahih (2/133), and Dhahabi agreed with him. Makhul explicitly stated that he heard it directly, and he is free of tadlis according to the correct view, and praise be to Allah.