https://thornhillkollel.com/wp-content/uploads/2016/02/shabbos-perek-chof-daled-mishna-1-what-a-person-may-do-if-he-is-on-the-road-at-the-onset-of-shabbos.mp3“shabbos perek chof daled mishna 1 what a person may do if he is on the road at the onset of shabbos”.