The Messenger of Allah ﷺ prayed Dhuhr and Asr together, and Maghrib and Isha together, without there being any fear or travel.Malik said, "I think this was during rain."
حدثنا القعنبي عن مالك عن أبي الزبير المكي عن سعيد بن جبير
صلى رسول الله ﷺ الظهر والعصر جميعا والمغرب والعشاء جميعا في غير خوف ولا سفر قال قال مالك أرى ذلك كان في مطر
Muslim narrated it in "Prayer of the Traveler," chapter "Combining Two Prayers While Resident," no. 705, from the hadith of Malik through this route, and it is found in Muwatta (narrated by Yahya): 1/144 (and by Qanabi, p. 185).