O thou inhabitant of Lachish, bind the chariot to the swift beast: she is the beginning of the sin to the daughter of Zion: for the transgressions of Israel were found in thee. Inhabitant of Lachish - This city was in the tribe of Judah, Joshua 15:39, and was taken by Sennacherib when he was coming against Jerusalem, 2 Kings 18:13, etc., and it is supposed that he wished to reduce this city first, that, possessing it, he might prevent Hezekiah's receiving any help from Egypt.
She is the beginning of the sin - This seems to intimate that Lachish was the first city in Judah which received the idolatrous worship of Israel.