Sahih Bukhari

Narrated `Amr:Jabir bin `Abdullah said, ""Mu`adh bin Jabal used to pray with the Prophet (ﷺ) and then go to lead his people in prayer Once he led the `Isha' prayer and recited Surat ""Al-Baqara."" Somebody left the prayer and Mu`adh criticized him. The news reached the Prophet (ﷺ) and he said to Mu`adh, 'You are putting the people to trial,' and repeated it thrice (or said something similar) and ordered him to recite two medium Suras of Mufassal."" (`Amr said that he had forgotten the names of those Suras)