Psalms 105:16-20

So God decreed a famine upon Canaan-land, cutting off their food supply. 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.