Sunan Ibn Majah
1070
Sahih+3

It was narrated from Mu’adh bin Jabal that the Prophet (ﷺ) combined the Zuhr and ‘Asr, and the Maghrib and ‘Isha’ when traveling during the campaign of Tabuk

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi