O you inhabitant of Lachish, harness the chariot to the swift steeds: it is the beginning of sin to the daughter of Zion: for the transgressions of Israel were found in you.
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George Leo Haydock
Lachis, when Sennacherib came to besiege it, 4 Kings xviii. 13. (Calmet)
Beginning. That is, Lachis was the first city of Juda that learnt from Samaria the worship of idols, and communicated it to Jerusalem. (Challoner)
This is not very probable. We may translate, "this is the source of sin "or of chastisement; or the imitation of Israel, is the chief of the crimes of Sion. (Calmet)