Sayyiduna Abu Mas'ud al-Ansari (may Allah be pleased with him) says that a man came to the Prophet (peace and blessings be upon him) and said: "O Messenger of Allah! I can hardly catch the congregational prayer, because so-and-so makes the prayer long." I have not seen the Prophet (peace and blessings be upon him) in any sermon as angry as he (peace and blessings be upon him) was that day. He (peace and blessings be upon him) said: "O people! Some of you drive people away, so whoever leads people in prayer should make it light, for among them are the sick, the weak and those with needs."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5265