When does the congregant in Friday and congregational prayers say the same as the Imam, and when does he remain silent? Does he say it before, after, or with him? And what should he do if the Imam prolongs the remembrance, such as saying "Subhana Rabbiyal A'la," and the congregant has already finished?

The congregant says the same as the Imam, "Subhan Rabbi al-A'la" (Glory be to my Lord, the Most High) in prostration. He may also supplicate after that, due to the Prophet's (peace and blessings be upon him) saying: "The closest a servant is to his Lord is while he is prostrating, so increase in supplication therein." It is recommended to fear Allah and to observe prayers at their appointed times with the Muslim congregations.