Sunan Abi Dawud Book 2, Hadith 190
I heard the Messenger of Allah (ﷺ) say: He who leads the people in prayer, and he does so at the right time, will receive, as well as those who are led (in prayer) will get (the reward). He who delays (prayer) from the appointed time will be responsible (for this delay) and not those who are led in prayer.
Sulayman, the freed slave of Maymunah, said: I came to Ibn Umar at Bilat (a place in Medina) while the people were praying. I said: Do you not pray along with them? He said: I heard the Messenger of Allah (ﷺ) say: Do not say a prayer twice in a day.
I heard the Messenger of Allah (ﷺ) say: One of the signs of the Last Hour will be that people in a mosque will refuse to act as imam and will not find an imam to lead them in prayer.