Sunan Abi Dawud 1057
سنن أبي داود#1057SahihNarrated Usamah ibn Umayr al-Huzali: The rain was falling on the day when the Battle of Hunayn took place. The Prophet (ﷺ), therefore, commanded that the people should offer their prayer in their camps
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
In-book reference: 2:668