I saw the Messenger of Allah ﷺ combine the sunset and night prayers whenever he was pressed to travel quickly.
حدثنا سفيان عن الزهري
رأيت رسول الله ﷺ يجمع بين المغرب والعشاء إذا جد به السير
Its isnad is sahih. It is an abridgment of 4472 and part of 4531.