Genesis 39:1 And Joseph was brought down to Egypt; and Potiphar, an officer of Pharaoh, captain of the guard, an Egyptian, bought him of the hands of the Ishmeelites, which had brought him down thither. - Free Bible Online

      Ge 39:1-23. JOSEPH IN POTIPHAR'S HOUSE.

      1. Potiphar--This name, Potiphar, signifies one "devoted to the sun," the local deity of On or Heliopolis, a circumstance which fixes the place of his residence in the Delta, the district of Egypt bordering on Canaan.
      officer--literally, "prince of the Pharoah"--that is, in the service of government.
      captain of the guard--The import of the original term has been variously interpreted, some considering it means "chief cook," others, "chief inspector of plantations"; but that which seems best founded is "chief of the executioners," the same as the captain of the watch, the zabut of modern Egypt [WILKINSON].
      bought him . . . of the Ishmaelites--The age, appearance, and intelligence of the Hebrew slave would soon cause him to be picked up in the market. But the unseen, unfelt influence of the great Disposer drew the attention of Potiphar towards him, in order that in the house of one so closely connected with the court, he might receive that previous training which was necessary for the high office he was destined to fill, and in the school of adversity learn the lessons of practical wisdom that were to be of greatest utility and importance in his future career. Thus it is that when God has any important work to be done, He always prepares fitting agents to accomplish it.

JFB.