John Calvin Commentary Genesis 34:1

"And Dinah the daughter of Leah, whom she bare unto Jacob, went out to see the daughters of the land." — Genesis 34:1 (ASV)

And Dinah... went out. This chapter records a severe trial with which God again tested his servant. We can readily understand how precious his daughter's chastity would be to him, considering the integrity of his whole life. Therefore, when he heard that she was violated, this disgrace would inflict the deepest wound of grief on his mind. Yet soon his grief tripled when he heard that his sons, from a desire for revenge, had committed a most dreadful crime.

But let us examine everything in order. Dinah was violated because, having left her father’s house, she wandered about more freely than was proper. She should have remained quietly at home, as both the Apostle teaches and nature itself dictates. For the virtue suitable for girls, which the proverb also applies to women, is that they should be (οἰκουροὶ) or keepers of the house.

Therefore, fathers of families are taught to keep their daughters under strict discipline if they wish to protect them from all dishonor. For if vain curiosity was so heavily punished in the daughter of holy Jacob, no less danger threatens vulnerable virgins today if they go too boldly and eagerly into public gatherings and arouse the passions of youth towards themselves.

For there is no doubt that Moses partly assigns the blame for the offense to Dinah herself when he says, she went out to see the daughters of the land; whereas she should have remained under her mother’s supervision in the tent.