פירוש על בראשית 45:17

טענו את בעירכם LADE YOUR BEASTS — with grain.

אמור אל אחיך זאת עשו, this is what should be your purpose to take your father and your families, etc.

זאת עשו, "Do this, etc." Whereas you do not require permission for most of what you are about to do, you do need Pharaoh's permission to take the wagons for transporting your families. When the Torah describes Pharaoh as telling Joseph to present the wagons to be used as something Pharaoh had "commanded, etc." this is only a figure of speech for a courteous invitation by Pharaoh that the brothers' families should avail themselves of these facilities on their journey to Egypt.