Matthew Poole and continuators on Isaiah 28:21

21. For the LORD shall rise up as in mount Perazim , he shall be wroth as in the valley of Gibeon , that he may do his work, his strange work ; and bring to pass his act, his strange act.

To act and fight against you, as he is said to sit still, when he doth forbear to act.

Where he fought against the Philistines, 2 Sam. 5. 20.

Where he fought against the Canaanites, Ios. 10. 10. &c. and afterwards against the Philistines, 1 Chron. 14. 16.

The execution of his Judgment against Israel, which he calleth his strange work, to intimate, either 1. That God would punish them not with ordinary punishments; but in a most dreadful and singular, and extraordinary manner; such a Judgment being called a marvellous work, Isa. 29, 14. although the Hebrew word there used, be not the same with this, but of a much differing signification: Or rather 2. That this work of bringing total and irrecoverable Destruction upon Israel, was contrary to the benignity of his own Nature, and to his usual way of dealing with his people, whom he used and delighted to protect, and spare, and bless; and whom, even when he is angry with them, and punisheth them, he handleth more gently, than he doth other persons, in Judgment remembring Mercy to them, as was noted, Isa. 27. 7, 8. see also Chap. 26. 11.

Marginal references: 2 Sam. 5. 20. 1 Chr. 14. 11.; Josh. 10. 12. 2 Sam. 5. 25. 1 Chr. 14. 16.