Then the moon shall be confounded, and the sun ashamed, when the LORD of hosts shall reign in mount Zion, and in Jerusalem, and before his ancients gloriously.
When the Lord of hosts shall reign in mount Zion ... - (Jeremiah 3:17.) Still future: of which Jesus' triumphal entry into Jerusalem amidst hosannas was a pledge.
His ancients - the elders of His people; or in general, His ancient people, the Jews. After the overthrow of the world-kingdoms, Yahweh's shall be set up with a splendour exceeding the light of the sun and moon under the previous order of things (Isaiah 60:19-20).
Remarks: The theme of this chapter is the judgment coming upon the professing Christian world for its unfaithfulness to the covenant. The whole fabric of society, political and religious, including the people and the priest alike, shalt be broken up. The relations of life, according to the present world-course, shall come to an abrupt termination. The cause for the coming judgment shall be the same as in the days of Noah-namely, the apostasy of the men of the earth from the clearest revelation that has ever been vouchsafed to me. Professing Christendom shall have proved false to "the everlasting covenant." Therefore "the earth" being so 'defiled under its inhabitants' (Isaiah 24:5) is doomed to "the curse."