Sunan Abi Dawud Book 4, Hadith 9
They (the Companions) proceeded on the expedition of Tabuk along with the Messenger of Allah (ﷺ). He combined the noon and afternoon prayers and the sunset and night prayers. One day he delayed the prayer and came out (of his dwelling) and combined the noon and the afternoon prayers. He then went it and then came out and combined the sunset and the night prayers.
When the Messenger of Allah (ﷺ) halted at a certain place (while on a journey), he would not leave that place till he offered the noon prayer. A man said to him: Even if in the middle of the day? He replied: Even if in the middle of the day.
Ibn Umar was informed about the death of Safiyyah (the wife of the Prophet) when he was at Mecca. He proceeded till the sun set and the stars shined. He said: When the Prophet (ﷺ) was in a hurry about something while on a journey, he would combine both these prayers. He proceed till twilight had disappeared. He then combined both of them (the prayers).