Khalid was about a mile from Bosra when the wind carried the sounds of battle to him. He immediately ordered the men to horse, and as soon as the cavalry was ready, led it at a gallop towards the battlefield. But Khalid and the Romans never met. As soon as the Romans discovered the arrival of the Muslim cavalry, they broke contact from Shurahbil and withdrew hastily into the fort. The Muslims under Shurahbil came to regard this occurrence as a miracle: the Khalid had been sent to save them from destruction!