It is narrated from Hazrat Abu Hurairah (may Allah be pleased with him) that once the Noble Prophet (peace and blessings be upon him) came to the mosque and saw people in separate groups. The Prophet (peace be upon him) became so intensely angry that we had never seen him in such severe anger before, and he said: "By Allah, I had intended to order a man to lead the people in prayer, and then go out in search of those who stay back from the prayer and remain sitting in their homes, and set fire to their houses." (Sometimes the narrator would specify the restriction of the Isha prayer.)