Flavius Josephus, Antiquities of the Jews
William Whiston, A.M., Ed.

[254] Now the Egyptians, after they had been preserved by Moses, entertained a hatred to him, and were very eager in compassing their designs against him, as suspecting that he would take occasion, from his good success, to raise a sedition, and bring innovations into Egypt; and told the king he ought to be slain. The king had also some intentions of himself to the same purpose, and this as well out of envy at his glorious expedition at the head of his army, as out of fear of being brought low by him and being instigated by the sacred scribes, he was ready to undertake to kill Moses: but when he had learned beforehand what plots there were against him, he went away privately; and because the public roads were watched, he took his flight through the deserts, and where his enemies could not suspect he would travel; and, though he was destitute of food, he went on, and despised that difficulty courageously; and when he came to the city Midian, which lay upon the Red Sea, and was so denominated from one of Abraham's sons by Keturah, he sat upon a certain well, and rested himself there after his laborious journey, and the affliction he had been in. It was not far from the city, and the time of the day was noon, where he had an occasion offered him by the custom of the country of doing what recommended his virtue, and afforded him an opportunity of bettering his circumstances.