question #1 Sahih Muslim 466a, Book 4, Hadith 206 : What guidance did the Prophet Muhammad (ﷺ) give regarding the length of prayers led by an imam?

A person came to the Messenger of Allah (ﷺ) and said: I keep away from the morning prayer on account of such and such (a man), because; he keeps us so long. I never saw God’s Messenger (ﷺ) more angry when giving an exhortation than he was that day. He said: 0 people, some of you are scaring people away. So whoever of you leads the people in prayer he must be brief, for behind him are the weak, the aged, and the people who have (argent) business to attend.