Sunan Abi Dawud 2746
سنن أبي داود#2746SahihNarrated Abdullah ibn Umar: The Messenger of Allah (ﷺ) used to give to some of the detachments he sent out (something extra) for themselves in particular apart from the division made to the whole army. The fifth is necessary in all that
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (3135) Sahih Muslim (1750)
In-book reference: 15:270