Matthew Poole and continuators on Genesis 34:7

7 And the sons of Jacob came out of the field, when they heard it, and the men were grieved: and they were very wroth, because he had wrought folly in Israel , in lying with Jacobs daughter, which thing ought not to be done .

That is, wickedness, which howsoever vain men many times esteem their wisdom, by the sentence of the all-wise God is accounted and commonly in Scripture called folly, as Deut. 22. 21. Ios. 7. 15. Iudg. 19. 23. and 20. 6. &c.

Or, against Israel, either 1. against the person, and in or against the Family of Israel, a person near and dear to God and highly honoured by him and in Covenant with God; who therefore esteems the injuries done to Israel, as if they were done to himself. See Gen. 12. 3. Exod. 23. 22. Zech. 2. 8. Or 2. in or against the Church of God, which then was in a manner confined to that family, and which is oft called by the name of Israel. See Deut. 22. 21. Ios. 7. 15. And Moses may here vary the phrase from what was used in Iacobs time to what was usual in his time, the fence being in both the same, and therefore not altered by such a change.

Heb. shall not be done, i. e. should not, &c. But in the Hebrew language words of the future time oft signifie duty and decency, as Mal. 1. 6. and 2. 7.