Tower of Babel
From Landmark
a united human race
in the generations following the Great Flood,
speaking a single language
and migrating eastward,
comes to the land of Shinar
There they agree to build a city
and a tower tall enough to reach heaven.
God confounds their speech
so that they can no longer understand each other,
and scatters them around the world.
https://en.m.wikipedia.org/wiki/Tower_of_Babel
c 2124 the Great Earthquake divided the people,
and confused the languages.
see Sargon I