Exodus 2:11-13

11One day, after Moses had grown up, he went out to his own people1 and observed their hard labor. He saw an Egyptian beating a Hebrew, one of his own people. 12After looking this way and that and seeing no one, he struck down the Egyptian and hid his body in the sand.

13The next day Moses went out and saw two Hebrews fighting. He asked the one in the wrong, “Why are you attacking your companion?”