Exodus 2:11-15 NIV

[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. [13] The next day he went out and saw two Hebrews fighting. He asked the one in the wrong, “Why are you hitting your fellow Hebrew?” [14] The man said, “Who made you ruler and judge over us? Are you thinking of killing me as you killed the Egyptian?” Then Moses was afraid and thought, “What I did must have become known.” [15] When Pharaoh heard of this, he tried to kill Moses, but Moses fled from Pharaoh and went to live in Midian, where he sat down by a well.