The heat in the city of Medina is so felt by Muslims who have just migrated there. The people of Mecca who were used to the heat of Mecca were still feeling the heat in Madinah, the new place.
For the degree in Medina was higher than Mecca, at the beginning of the Prophet emigrated to Medina. No wonder, if a number of friends who followed the hijrah to Medina many complained about the high degree of heat of the city that was still called Yathrib.
At that time, the population Yathrib known to have bad habits, ie like reducing scales, steal dosage and the like. In fact, it is said that no group or population of a region is fraudulent in terms of scales, doses or sizes, beyond the Yatsrib population's fraud at the time. Therefore, the first letter that was revealed in Medina City was the letter of Al-Muthaffifin (83) verses 1-4.
"Accidents are great to those who cheat (that is) those who, when they receive the doses of others they ask to be filled and when they measure or weigh for others, they subtract.Not those people think that they will indeed be resurrected . " [Al-Muthaffifin (83): 1-4]
Thanks to the prayers of the Prophet and also the rebuke from Allah through this verse, in the end the people of Madinah turned into residents and people who are very concerned about the problem of scales, size and measure. Commodities that are measured or weighed on the scale or size of Medina, will receive the blessing of the Prophet. Today, we can prove the miracle of the Prophet's prayer for the people of Madinah Al-Munawarah.
Narrated by Imam Malik in the Book of Muwatta ', there is another prayer that the Prophet of the City of Medina