Exodus 2:11-12

And it cometh to pass, in those days, that Moses is grown, and he goeth out unto his brethren, and looketh on their burdens, and seeth a man, an Egyptian, smiting a man, a Hebrew, [one] of his brethren, and he turneth hither and thither, and seeth that there is no man, and smiteth the Egyptian, and hideth him in the sand.