It is narrated from Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "O Mu'adh! Obey every ruler, pray behind every imam, and do not revile any of my Companions."
This (chain) is munqati' (broken) between Makhul and Mu'adh.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قتال أهل البغي / 16769