Musannaf Ibn Abi Shaybah 7776 — Praying behind rulers

Bassam said: I asked Abu Ja'far whether one should pray behind the rulers. He said: "Pray with them, for we too pray with them. Sayyiduna al-Hasan and Sayyiduna al-Husayn (may Allah be pleased with them both) used to pray behind Marwan." I said to him: "People think that this was taqiyyah (dissimulation)." He said: "How can that be? Sayyiduna al-Hasan bin Ali (may Allah be pleased with him) used to rebuke Marwan to his face while he was on the pulpit, until he became governor."