JER 17:27

27 But if ye will not pay heed unto Me to keep the day of Shabbos holy, and not to bear a massa [(burden)], when entering in at the She'arim of Yerushalayim on the day of Shabbos; then will I kindle an eish in the she'arim thereof, and it shall devour the fortresses of Yerushalayim, and it shall not be quenched.