Acts 7:23-27

And when he was full forty years old, it came into his heart to visit his brethren the children of Israel.

And seeing one of them suffer wrong, he defended him, and avenged him that was oppressed, and smote the Egyptian:

For he supposed his brethren would have understood how that God by his hand would deliver them: but they understood not.

And the next day he shewed himself unto them as they strove, and would have set them at one again, saying, Sirs, ye are brethren; why do ye wrong one to another?

But he that did his neighbour wrong thrust him away, saying, Who made thee a ruler and a judge over us?