Philo Judaeus De Mutatione Nominum 117

[117] Therefore they will say that there were not the same causes why they should run back with such exceeding speed, making the double course from the objects of the outward sense and to the objects of the outward sense, without stopping to take breath, and with excessive impetuosity; but that the cause was rather the man who delivered them from the shepherds of the wild flock. And they call Moses an Egyptian, a man who was not only a Hebrew, but even a Hebrew of the very purest race, of the only tribe which is consecrated, because they are unable to rise above their own nature;