Gen 34:7 | JFB | STEP | 7. the men were grieved, and ... very wroth-- Good men in such a case could not but grieve; but it would have been well if their anger had been less, or that they had known the precept "let not the sun go down upon your wrath" [Ep 4:26]. No injury can justify revenge ( ; ); but Jacob's sons planned a scheme of revenge in the most deceitful manner.

‏ Genesis 34:7

7. the men were grieved, and ... very wroth--Good men in such a case could not but grieve; but it would have been well if their anger had been less, or that they had known the precept "let not the sun go down upon your wrath" [Ep 4:26]. No injury can justify revenge (De 32:35; Ro 12:9); but Jacob's sons planned a scheme of revenge in the most deceitful manner.