Genesis 39:4, 8, 23

Joseph found favor with Potiphar. He was quickly promoted to become the overseer of Potiphar’s house and was put in charge of all that he had.

“Never!” Joseph replied. “Don’t you realize that my master has nothing to worry about with me in charge, for he has put everything he has under my care?

The warden had no worries about the prison with Joseph in charge, because YAHWEH’s presence was with Joseph and caused everything Joseph did to prosper.