Marwan bin Al-Hakam narrated that:
Zaid bin Thabit said: "Why do I see you reciting short surahs in Maghrib when I saw the Messenger of Allah (ﷺ) reciting the longer of the two long surahs in it?" I said: "O Abu Abdullah, what is the longer of the two long surahs?" He said: "Al-A'raf."