Genesis 46:1

And Israel came to Beer — sheba, and offered sacrifices to the God of his father Isaac — He chose that place in remembrance of the communion which his father and grandfather had with God in that place. In his devotion he had an eye to God as the God of his father Isaac, that is, a God in covenant with him, for by Isaac the covenant was entailed upon him. He offered sacrifices, extraordinary sacrifices, besides those at his stated times. These sacrifices were offered, By way of thanksgiving for the late blessed change of the face of his family, for the good news he had received concerning Joseph, and the hopes he had of seeing him. By way of petition for the presence of God with him in his intended journey. By way of consultation. Jacob would not go on 'till he had asked God's leave.