Exodus 2:11-12
Exodus 2:11-12 ASV
And it came to pass in those days, when Moses was grown up, that he went out unto his brethren, and looked on their burdens: and he saw an Egyptian smiting a Hebrew, one of his brethren. And he looked this way and that way, and when he saw that there was no man, he smote the Egyptian, and hid him in the sand.