When Moses was grown, he went out unto his brethren, and looked on their burdens As one that not only pitied them, but was resolved to venture with them and for them. He slew the Egyptian Probably it was one of the Egyptian task-masters, whom he found abusing his Hebrew slave. By special warrant from Heaven (which makes not a precedent in ordinary cases) Moses slew the Egyptian, and rescued his oppressed brother. The Jews' tradition is, that he did not slay him with any weapon, but, as Peter slew Ananias and Sapphira, with the word of his mouth.
Related Commentaries of Exodus 2:11
Exodus 2:11-12
11 And it came to pass in those days, when Moses was grown, that he went out unto his brethren, and looked on their burdens: and he spied an Egyptian smiting an Hebrew, one of his brethren.
12 And he looked this way and that way, and when he saw that there was no man, he slew the Egyptian, and hid him in the sand.