'Two' in the Bible

Now there came a time, in the days of the judges, when there was no food in the land. And a certain man went from Beth-lehem-judah, he and his wife and his two sons, to make a living-place in the country of Moab.

And the name of the man was Elimelech, and the name of his wife Naomi, and the name of his two sons Mahlon and Chilion, Ephrathites of Beth-lehem-judah. And they came into the country of Moab, and were there for some time.

And Elimelech, Naomi's husband, came to his end; and only her two sons were with her.

And they took two women of Moab as their wives: the name of the one was Orpah, and the name of the other Ruth; and they went on living there for about ten years.

And Mahlon and Chilion came to their end; and the woman was without her two sons and her husband.

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:

So the two of them went on till they came to Beth-lehem. And when they came to Beth-lehem all the town was moved about them, and they said, Is this Naomi?

And all the people who were in the public place, and the responsible men, said, We are witnesses. May the Lord make this woman, who is about to come into your house, like Rachel and Leah, which two were the builders of the house of Israel: and may you have wealth in Ephrathah, and be great in Beth-lehem;