Musannaf Ibn Abi Shaybah 38890 — The man marrying again after lian

Sayyiduna Abu Hurayrah (may Allah be pleased with him) reports that the Prophet (peace and blessings be upon him) said: "The imam is appointed only to be followed. So when he says the takbir, say the takbir; when the imam recites, remain silent; when the imam says 'not of those who have earned anger, nor of those who go astray,' say Amin; when the imam bows, bow; when the imam says 'Sami'a Allahu liman hamidah' (Allah hears the one who praises Him), say 'Allahumma rabbana wa lakal-hamd' (O Allah, our Lord, to You belongs all praise); when the imam prostrates, prostrate; and when the imam prays sitting, pray sitting." It is mentioned that the view of (Imam) Abu Hanifah is: When the imam is sitting, following him (by sitting) is not valid.