Contradiction with Genesis 6:3
This verse suggests human lifespan is limited to 120 years, while Genesis 11:23 implies Serug lived up to 230 years after he became a father.
Genesis 6:3: And the LORD said, My spirit shall not always strive with man, for that he also [is] flesh: yet his days shall be an hundred and twenty years.
Contradiction with Psalm 90:10
This passage indicates the average human lifespan is 70 to 80 years, which contrasts with the extended lifespan mentioned in Genesis 11:23.
Psalm 90:10: The days of our years [are] threescore years and ten; and if by reason of strength [they be] fourscore years, yet [is] their strength labour and sorrow; for it is soon cut off, and we fly away. [The days...: Heb. As for the days of our years, in them are seventy years]