In the Name of God, the Most High
After leaving the city boundary, the traveler must reach a point, called Hadde Tarakhus, at which he can start offering his Qasr Salat if he wishes. This point is defined as a place where the traveler is not able to see the people of that city. It is the point away from the boundary of a city whose inhabitants cannot be seen. Some jurists consider it to be a point from where the city's call to prayers (adhan) cannot be heard. One who is considered to be a traveler according to Islamic law can shorten his prayers and break his fast.