The Messenger of Allah ﷺ prayed Maghrib and Isha together at Muzdalifa.
أن رسول الله ﷺ صلى المغرب والعشاء بالمزدلفة جميعا.
Malik narrated it in Hajj (196) from Ibn Shihab, from Salim bin Abdullah, from his father, and he related it. Muslim also narrated it in Hajj (703:286) by way of Malik, and Bukhari narrated it in Hajj (1673) through another route from Salim, similarly.