Genesis 11:10

10 This is the story of Shem. When Shem was 100 years old, he had Arphaxad. It was two years after the flood.

Genesis 11:10 Meaning and Commentary

Genesis 11:10

These are the generations of Shem
Or a genealogy of the posterity of Shem; not of all of them, only of those of the line which led to Abraham, by which might appear the true line in which the Messiah from Adam through Abraham sprung:

Shem was one hundred years old, and begat Arphexad two years after
the flood;
by which it is pretty plain that he was younger than Japheth; (See Gill on Genesis 10:21) of Arphaxad his son, (See Gill on Genesis 10:22).

Genesis 11:10 In-Context

8 Then God scattered them from there all over the world. And they had to quit building the city.

9 That's how it came to be called Babel, because there God turned their language into "babble." From there God scattered them all over the world.

10 This is the story of Shem. When Shem was 100 years old, he had Arphaxad. It was two years after the flood.

11 After he had Arphaxad, he lived 600 more years and had other sons and daughters.

12 When Arphaxad was thirty-five years old, he had Shelah.