Genesis 11:10

10 These [are] births of Shem: Shem [is] a son of an hundred years, and begetteth Arphaxad two years after the deluge.

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 And Jehovah doth scatter them from thence over the face of all the earth, and they cease to build the city;

9 therefore hath [one] called its name Babel, for there hath Jehovah mingled the pronunciation of all the earth, and from thence hath Jehovah scattered them over the face of all the earth.

10 These [are] births of Shem: Shem [is] a son of an hundred years, and begetteth Arphaxad two years after the deluge.

11 And Shem liveth after his begetting Arphaxad five hundred years, and begetteth sons and daughters.

12 And Arphaxad hath lived five and thirty years, and begetteth Salah.