Sunan Abi Dawud 2951
سنن أبي داود#2951HasanNarrated Abdullah ibn Umar: Zayd ibn Aslam said: Abdullah ibn Umar entered upon Mu'awiyah. He asked: (Tell me) your need, AbuAbdurRahman. He replied: Give (the spoils) to those who were set free, for I saw the first thing the Messenger of Allah (ﷺ) did when anything came to him was to give something to those who had been set free
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan
Muhammad Muhyi Al-Din Abdul HamidHasan
Zubair Ali ZaiIsnaad Hasan
In-book reference: 20:24