New Defender's Study Bible Notes
39:1 officer of Pharaoh. The word here used for “officer” actually means “eunuch.” The same word later was used for Pharaoh’s butler and baker (Genesis 40:2). Evidently, any man who accepted a high position in Pharaoh’s bureaucracy was required to become a eunuch. This situation may have contributed to the adulterous desires of Potiphar’s wife.
39:20 in the prison. More detailed information about the sufferings of Joseph in the prison are given in Psalm 105:17-18.