Genesis 41:1

At the end of two full years After the butler's restoration to his place. No doubt Joseph was some considerable time in prison before the keeper of the prison would so far trust him as to commit the other prisoners, especially the state prisoners, to his charge; and he was some time confined with them. Yet two years more pass away before his deliverance came. By this great and long-continued humiliation and trial, he was prepared for the extraordinary exaltation which God designed for him.