Sayyiduna Uqbah bin Amir (may Allah be pleased with him) said: A man came to the Messenger of Allah (peace and blessings be upon him) and said: O Messenger of Allah, I hold back from the Fajr prayer because so-and-so makes the recitation long for us. I never saw the Messenger of Allah (peace and blessings be upon him) angrier in any admonition than he was that day. Then he said: "Whoever leads the people in prayer should keep the prayer light for them, for among them are the young, the old, the weak and the one with a need."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14631