EXOD52 We must come to the aid of even a complete stranger. Having shown us Moshe's kindness to his own people, the Torah proceeds to give us a glimpse of Moshe's kindness to total strangers from another nation. Moshe was forced to flee from Egypt to save his life. He came to Midian, a foreign land, and witnessed shepherds driving Yisro's daughters away from the well. Although he might have been preoccupied with his own problems, he did not overlook a wrongdoing, and came to the rescue of people whom he had never seen before. Not only did he save Yisro's daughters, but he even watered their flock. Chochmah Umussar Vol.1, p. 10.