Exodus 2:11-14

One day, after Moses had grown [into adulthood], it happened that he went to his countrymen and looked [with compassion] at their hard labors; and he saw an Egyptian beating a Hebrew, one of his countrymen. He turned to look around, and seeing no one, he killed the Egyptian and hid him in the sand. He went out the next day and saw two Hebrew men fighting with each other; and he said to the aggressor, “Why are you striking your friend?” But the man said, “Who made you a prince and a judge over us? Do you intend to kill me as you killed the Egyptian?” Then Moses was afraid and said, “Certainly this incident is known.”