Genesis 19:37-38 Catholic Public Domain Version (CPDV)

37. And the elder gave birth to a son, and she called his name Moab. He is the father of the Moabites, even to the present day.

38. Likewise, the younger gave birth to a son, and she called his name Ammon, that is, 'the son of my people.' He is the father of the Ammonites, even today.

Genesis 19