Jamieson, Fausset and Brown on Micah 1:13

13. "Bind the chariot to the swift steed," in order by a hasty flight to escape the invading foe. Compare Note, see on Is 36:2, on "Lachish," at which Sennacherib fixed his headquarters (2Ki 18:14, 17; Jr 34:7).

she is the beginning of the sin to ... Zion--Lachish was the first of the cities of Judah, according to this passage, to introduce the worship of false gods, imitating what Jeroboam had introduced in Israel. As lying near the border of the north kingdom, Lachish was first to be infected by its idolatry, which thence spread to Jerusalem.