Matthew Poole and continuators on Jeremiah 17:27

27 But if you will not hearken unto me to hallow the sabbath day, and not to bear a burden, even entring in at the gates of Jerusalem on the sabbath day, then will I kindle a fire in the gates thereof, and it shall devour the palaces of Jerusalem, and it shall not be quenched .

A threatning quite contrary to the former promise upon their acting contrary to the duty to which that promise was annexed. God would destroy their City, it should be burned with fire, and the highest and noblest structures should be burned▪ and though the hand of the Enemy should do this, yet God should order them to do it, so as it should be a fire of his kindling, and therefore not like to be quenched, till it had effected that thing for which God so kindled it.