None do.<quoted text>
What scriptures from the Bible say the earth is only 6000 yrs old?
If you make some assumptions?
Such as only 20 years per generation (a relatively safe assumption).
And that the various conflicting "this begat that" lists of people in the bible are valid?(none of which agree with the other lists)
And if you take said lists, and combine them all?
And then crunch the numbers?
You get roughly 6000 years (more or less).
Lots of assumptions, though.....
... not the least is the list of "begats" does not include ages of who begat whom, and when ...
But missing facts never stopped those True Believers™ from making up sh7t as they pleased.