'Commander in chief' in the Bible

Meanwhile, down in Egypt, the Midianites sold Joseph to Potiphar, one of Pharaoh's court officials, who was also Commander-in-Chief of the imperial guards.

Meanwhile, Joseph had been delivered to Egypt and turned over to Potiphar, one of Pharaoh's court officials and the Commander-in-Chief of the imperial guards. An Egyptian, he bought Joseph from the Ishmaelites, who had brought him down there.