In the last couple of chapters of Ezra, when the Jews were returning to their homeland in Judea after seven decades as displaced captives in the land of their conquerors, one of the reforms to get the struggling nation back on its feet was to purge foreigners from their midst. In doing so, the men of the nation made a pact to send their foreign wives away, some of which had borne children.
What strikes me is that this action could not have been healthy for the kids of those marriages, and likely resulted in not a little anguish as husbands and wives were separated. We know from other passages (such as Malachi 2:16) that God hates divorce, yet here we have an entire nation committing divorce wholesale, presumably with God's blessing.
I'm not sure what to do with this information.