The Friday Prayer On A Rainy Day Sunan Abi Dawud 1059
Translation
Narrated Usamah ibn Umayr al-Huzali
He witnessed the Prophet (ﷺ) at the time of al-Hudaybiyyah on a Friday, and rain fell upon them such that the lower parts of their sandals were not wetted, so he commanded them to pray in their dwellings.