(215) باب الْجُمُعَةِ فِي الْيَوْمِ الْمَطِيرِ
Narrated 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.
Reference: Sunan Abi Dawud 1057
In-book reference: Book 2, Hadith 668
English translation: Book 3, Hadith 1052