Psalms 105:17-22

But he had already sent a man ahead of his people to Egypt; it was Joseph, who was sold as a slave. His feet were bruised by strong shackles and his soul was held by iron. God’s promise to Joseph purged his character until it was time for his dreams to come true. Eventually, the king of Egypt sent for him, setting him free at last. Then Joseph was put in charge of everything under the king; he became the master of the palace over all the royal possessions. Pharoah gave him authority over all the princes of the land, and Joseph became the teacher of wisdom to the king’s advisers.