Matthew Poole and continuators on Amos 8:9

9 And it shall come to pass in that day, saith the Lord GOD , that I will cause the sun to go down at noon , and I will darken the earth in the clear day .

Most certainly 'twill be,

when God begins to execute these his just and severe judgments on the Ten Tribes.

The great, just, holy, and terrible God who is provoked by these sins, and hath denounced these judgments, my hand shall be evident in it,

literally say some but erroneously, by Sun I understand rather the setled state of their prosperity under their present Government in the house of Iehu, or it may refer particularly to their King and Court, which Ieroboam at his death left like the Sun at Noon in the height of their Glory, as all know, who know the History of those times.

So Israels Sun did as at Noon set under the dark Cloud of home bred Conspiracies and Civil Wars by Shallum, Menahem, Pekah, and Hoshea till the midnight darkness drew on by Pul, Tiglath Pilneser, and Salmaneser.

Bring a thick cloud of Troubles and Afflictions.

The common people, the whole Body of the Nation, so the Sun speaks the Royalty, Nobility, and great ones of this Kingdom by an allusion well known in Scripture, and the Earth speaks the common sort of people, and all are here threatned.

When they did think (as in Ieroboam's time) all was safe, sure, and well setled, far from the night of sorrow and trouble, then will God bring all this he threatneth upon them.