Sunan Abi Dawud 2925
سنن أبي داود#2925SahihNarrated Jubair b. Mu'tim:The Messenger of Allah (ﷺ) as saying: There is no alliance in Islam, and Islam strengthened the alliance made during pre-Islamic days
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 Muslim (2530)
In-book reference: 19:41