The priest of Midian gave Moses, his daughter

The correct answer is Zipporah. In the book of Exodus, chapter 2, we are told that Moses fled Egypt after killing an Egyptian taskmaster and ended up in the land of Midian. There he helped out the daughters of the priest of Midian by watering their flocks, and the priest invited him to his home. Moses stayed with the priest and eventually married his daughter, Zipporah. Later on in Exodus, we see that Zipporah and Moses had a son named Gershom.