Albert Barnes Commentary Micah 1:14

"Therefore shalt thou give a parting gift to Moresheth-gath: the houses of Achzib shall be a deceitful thing unto the kings of Israel." — Micah 1:14 (ASV)

Therefore you shall give - (bridal) presents to Moresheth Gath. Therefore! Since Judah had thus become a partaker of Israel’s sins, she had broken the covenant by which God had given her the land of the pagans, and she would have to part with it to foreigners.

The bridal presents, literally the dismissals, were the dowry (1 Kings 9:16) with which the father sent away his daughter (Judges 12:9) to belong to another, her lord or husband, never again to return.

Moresheth (literally, "inheritance"), the inheritance that God gave her, was to be parted with; she was to be laden with gifts to the enemy. Judah would have to part with her, and her own treasure as well.

The houses of Achzib shall be a lie - Achzib, probably so named from a winter brook (achzab), was to become what its name signified: a resource that would fail precisely in the time of need, just as winter brooks do in the summer drought.

The prophet asks, “Will You be to me as a failing brook, waters that are not sure?” (Jeremiah 15:18).

This Achzib, which is listed between Keilah and Mareshah (Joshua 15:44), was probably one of the oldest towns of Palestine, mentioned in the history of the Patriarch Judah. After having survived for about 1,000 years, it would, in time of need, fail.

Here, "the kings of Israel" refers to the kings of Judah. When this prophecy would be accomplished, the ten tribes would have ceased to have any political existence; the remnant in their own land would have no leader to look to, except the line of David, whose good kings cared for them. Micah then, having prophesied the utter destruction of Samaria, speaks in accordance with the state of affairs that he foresaw and foretold.