Genesis 34:5

“And Jacob heard that he had defiled Dinah his daughter, etc.] That is, that Shechem had defiled her; the report of this was brought him very probably by one of the maids which attended her to the city; for it was hardly to be thought that she should go thither alone, and which must be very distressing to Jacob to hear of: this was his first affliction in his own family, but it was not the only one, nor the last, others quickly followed: now his sons were with his cattle in the field; he had bought, or in some other hired by him for his cattle, feeding and keeping them, being arrived to an age fit for such service; here they were when the above report was brought to Jacob: and Jacob held his…”

“Jacob held his peace--Jacob, as a father and a good man, must have been deeply distressed. But he could do little. In the case of a family by different wives, it is not the father, but the full brothers, on whom the protection of the daughters devolves--they are the guardians of a sister's welfare and the avengers of her wrongs. It was for this reason that Simeon and Levi, the two brothers of Dinah by Leah [Gen 34:25], appear the chief actors in this episode; and though the two fathers would have probably brought about an amicable arrangement of the affair, the hasty arrival of these enraged brothers introduced a new element into the negotiations.”

“- Dinah’s Dishonor This chapter records the rape of Dinah and the revenge of her brothers. Genesis 34:1-5 Dinah went out to see the daughters of the land. The Jewish doctors of a later period fix the marriageable age of a female at twelve years and a day. It is probable that Dinah was in her thirteenth year when she went out to visit the daughters of the land. Six or seven years, therefore, must have been spent by Jacob between Sukkoth, where he abode some time, and the neighborhood of Shekerm, where he had purchased a piece of ground. If we suppose Dinah to have been born in the same year with Joseph, who was in his seventeenth year at the time of his being sold as a bondslave Genesis 37:2,…”

“34:5-7 Jacob’s response to this crime is surprising. When he heard that Dinah had been defiled, he said nothing about it until his sons came home. Because Jacob did not act, his sons did, though without the wisdom and integrity necessary for justice. Dinah’s full brothers were shocked and furious that Shechem had done such a disgraceful thing to Jacob’s family (literally in Israel; this is the first use of the name Israel to describe the family). This sexual crime was an outrage against the community of God’s people and deserved punishment, but the leader of the clan did nothing.”