Genesis 39:1-4

Now Joseph had been taken down to Egypt; and Potiphar, an Egyptian officer of Pharaoh, the captain of the [royal] guard, bought him from the Ishmaelites, who had taken him down there. The LORD was with Joseph, and he [even though a slave] became a successful and prosperous man; and he was in the house of his master, the Egyptian. Now his master saw that the LORD was with him and that the LORD caused all that he did to prosper (succeed) in his hand. [Gen 21:22; 26:27, 28; 41:38, 39] So Joseph pleased Potiphar and found favor in his sight and he served him as his personal servant. He made Joseph overseer over his house, and he put all that he owned in Joseph’s charge.