Genesis 19:37 KJV
And the firstborn bare a son, and called his name Moab: the same is the father of the Moabites unto this day.
Genesis 19:37, King James Version
In context
36 Thus were both the daughters of Lot with child by their father.
37 And the firstborn bare a son, and called his name Moab: the same is the father of the Moabites unto this day.
38 And the younger, she also bare a son, and called his name Ben–ammi: the same is the father of the children of Ammon unto this day.