(Exodus 12:37) "And the children of Israel journeyed from Ramses to Succoth": From Ramses to Succoth was a distance of forty parasangs, and the voice of Moses traveled (the distance of) a forty day journey. And let this not be a cause of wonder to you. For it is written (Ibid. 9:8-9) "And the L–rd said to Moses and to Aaron: Take for yourselves your full handfuls of furnace soot … And it shall be dust over all the land of Egypt, etc." Now does this not follow a fortiori, viz.: If dust, whose nature it is not to travel, traveled a distance of forty days, how much more so a voice, whose nature it is to travel!