'Two' in the Bible

In the days when the judges governed [Israel], there was a famine in the land [of Canaan]. And a certain man of Bethlehem in Judah went to live temporarily in the country of Moab with his wife and his two sons.

The man’s name was Elimelech and his wife’s name was Naomi and his two sons were named Mahlon and Chilion. They were Ephrathites from Bethlehem in Judah. They went to the country of Moab and stayed there.

Then Elimelech, Naomi’s husband, died, and she was left [a widow] with her two sons.

and then both Mahlon and Chilion also died, so the woman [Naomi] was left without her two sons and her husband.

So she left the place where she was living, her two daughters-in-law with her, and they started on the way back to the land of Judah.

But Naomi said to her two daughters-in-law, “Go back, each of you return to your mother’s house. May the Lord show kindness to you as you have shown kindness to the dead and to me.

All the people at the gate and the elders said, “We are witnesses. May the Lord make the woman who is coming into your house like Rachel and Leah, the two who built the household of Israel. May you achieve wealth and power in Ephrathah and become famous in Bethlehem.