The ultimate standard for Muslim leaders is the Prophet Muhammad (pbuh). Recognized by many non-Muslim historians and social scientists as the person who most influenced the course of human history, Prophet Muhammad (pbuh) best embodies the personal qualities necessary for effective, God-fearing leadership. Since his time, the barometer by which any Muslim leader is measured continues to be that of the last Messenger of Allah.
His dress was always clean, though simple. He was very mindful of cleanliness. He washed his hands and mouth before and after taking his meals.
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