Genesis 37:36

And the Midianites sold him into Egypt unto Potiphar, an officer of Pharaoh's, {and} captain of the guard. {officer: Heb. eunuch: but the word doth signify not only eunuchs, but also chamberlains, courtiers, and officers} {captain...: or, chief marshal: Heb. chief of the slaughter men, or executioners}