'Daughters in law' in the Bible

So she and her daughters-in-law got ready to go back from the country of Moab, for news had come to her in the country of Moab that the Lord, in mercy for his people, had given them food.

And she went out of the place where she was, and her two daughters-in-law with her; and they went on their way to go back to the land of Judah.

And Naomi said to her two daughters-in-law, Go back to your mothers' houses: may the Lord be good to you as you have been good to the dead and to me: