"Rama I cannot tolerate the touch of ones who are sinful in action. Therefore your (of descending this arrow down) mighty unfailing arrow can be released on them." [6-22-33]
By the letting down of the dart that resembled the glow of Indra that part of the land was indeed popularly known as Marakantara (Marwar and Bikaner region of Rajasthan). [6-22-35]