Sunan an-Nasa'i 587
سنن النسائي#587SahihIt was narrated from Abu At-Tufail 'Amir bin Wathilah that Mu'adh bin Jabal told him that they went out with the Messenger of Allah (ﷺ) in the year of Tabuk, and the Messenger of Allah (ﷺ) was joining Zuhr and 'Asr, and Maghrib and 'Isha'. He delayed the prayer one day then he went out and prayed Zuhr and 'Asr together, then he went in and came out again and prayed Maghrib and 'Isha
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 6:94