A man came to the Prophet (ﷺ) and said: "I join the morning Salat late because of so-and-so who leads it and prolongs it." (Abu Mas'ud said): I have never seen the Prophet (ﷺ) so angry while giving a speech as he was on that day. He (ﷺ) said, "Some of you create hatred among the people against faith. Whoever leads Salat (the prayer), should make it brief because the congregation includes old men and youngsters and those who have some urgent work to do."

[Al-Bukhari and Muslim].