Hadith.3751 - The Commander of the Faithful (as) said: A Bedouin from the tribe of Banu 'Amir came to the Prophet (peace be upon him and his family) and asked him about the worst and the best places on earth. The Messenger of Allah (swt) (peace be upon him and his family) said: "The worst places on earth are the markets-they are the playgrounds of Iblis. He sets out in the morning with his banner, places his throne there, and sends out his offspring among them. There, you find someone who cheats in measuring, another who falsifies the scale, someone who steals in length, or someone who lies about merchandise. Iblis then says to them: 'Stick to a man whose father has died while your father is still alive.' And he remains there, being the first to enter and the last to leave." Then Imam (as) said: "And the best places are the mosques. The most beloved among them to Allah (swt), the Mighty and Exalted, are those who enter first and leave last."