'Two' in the Bible

Now it came to pass in the days when the judges ruled, that there was a famine in the land. And a certain man of Bethlehemjudah went to sojourn in the country of Moab, he, and his wife, and his two sons.

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 Bethlehemjudah. And they came into the country of Moab, and continued there.

And Elimelech Naomi's husband died; and she was left, and her two sons.

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 died also both of them; and the woman was left of her two sons and her husband.

Wherefore she went forth out of the place where she was, and her two daughters in law with her; and they went on the way to return unto the land of Judah.

And Naomi said unto her two daughters in law, Go, return each to her mother's house: the LORD deal kindly with you, as ye have dealt with the dead, and with me.

So they two went until they came to Bethlehem. And it came to pass, when they were come to Bethlehem, that all the city was moved about them, and they said, Is this Naomi?

And all the people that were in the gate, and the elders, said, We are witnesses. The LORD make the woman that is come into thine house like Rachel and like Leah, which two did build the house of Israel: and do thou worthily in Ephratah, and be famous in Bethlehem: