Sunan Abi Dawud Book 4, Hadith 12
The Messenger of Allah (ﷺ) never combined the sunset and night prayers while on a journey except once.
Abu Dawud said: This has been narrated by Ayyub from Nafi' from Ibn 'Umar as a statement of Ibn 'Umar. Ibn 'Umar was never seen combining these two prayers except on the night he was informed about the death of Safiyyah. The tradition narrated by Makhul from Nafi' indicates that he (Nafi') saw Ibn 'Umar doing so once or twice.
On the expedition to Tabuk if the sun had passed the meridian before the apostle of Allah (ﷺ) moved off, he combined the noon and the afternoon prayers; but if he moved off before the sun had passed the meridian, he delayed the noon prayer till he halted for the afternoon prayer. He acted similarly for the sunset prayer; if the sun set before he moved off, he combined the sunset and the night prayers, but if he moved off before sunset, he delayed the sunset prayer till he halted for the night prayer and then combined them.
Abu Dawud said: Hisham b. 'Urwah narrated this tradition from Husain b. 'Abd Allah, from Kuraib on the authority of Ibn 'Abbas from the Prophet (ﷺ) like the tradition narrated by Mufaddal and al-Laith.
The Messenger of Allah (ﷺ) combined the noon and the afternoon prayers, and combined the sunset and night prayers without any danger or journey. Malik said: I think it so happened during rain.
Abu Dawud said: Hammad b. Salamah narrated it like manner from Abu al-Zubair, it has also been narrated by Qurrah b. Khalid from Abu al-Zubair. He said: It is so happened in a journey that we made to Tabuk.