Genesis 19:36-38 New English Translation (NET Bible)
36 In this way both of Lot’s daughters became pregnant by their father. 37 The older daughter[a] gave birth to a son and named him Moab.[b] He is the ancestor of the Moabites of today. 38 The younger daughter also gave birth to a son and named him Ben Ammi.[c] He is the ancestor of the Ammonites of today.