It was narrated that Abu Bakr as-Siddeeq said: O people, you recite this verse: `O you who believe! Take care of your own selves. If you follow the (right) guidance [and enjoin what is right (Islamic Monotheism and all that Islam orders one to do) and forbid what is wrong (polytheism, disbelief and all that Islam has forbidden)] no hurt can come to you from those who are in error` [al-Ma’idah 5:105]. I heard the Messenger of Allah (ﷺ) say: “If the people see an evildoer and do not stop him, soon Allah will send His punishment upon them all.”