Exodus 2:11–22 describes how Moses went from the adopted son of an Egyptian princess to an exiled shepherd living in Midian. As an adult, Moses defends a fellow Jew by killing an Egyptian aggressor. Moses is shocked to find that his attempt to hide the act failed, and he is forced to flee Egypt. In Midian, Moses heroically defends a group of shepherd girls, and is welcomed into their family. This establishes the backdrop of Moses’ life for one of God’s most dramatic encounters with man: the burning bush.
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Exodus 2:11 BibleRef.com
11 One day, after Moses had grown up, he went out to where his own people were and watched them at their hard labor. He saw an Egyptian beating a Hebrew, one of his own people. 12 Looking this way and that and seeing no one, he killed the Egyptian and hid him in the sand.