Genesis 10:21–32 (ESV)

21 To Shem also, the father of all the children of Eber, the elder brother of Japheth, children were born.

The most striking statement in this passage is found in Genesis 10:25: “To Eber were born two sons: the name of the one was Peleg, for in his days the earth was divided, and his brother’s name was Joktan.” The division spoken of here has to be the same division of the world’s population after the confusion of tongues in Genesis 11:1–32. This is the only division of the world’s population following the Flood that is mentioned in the Bible. The word used here for divide can also be used to indicate the confusion of tongues. The same Hebrew word is used in Psalm 55:9 where it clearly refers to the confusion of languages. Here we read: Destroy, O Lord, divide [confuse/confound] their tongues; for I see violence and strife in the city.

It is also quite fitting here that Nimrod went to live in the land of Shinar to establish some kind of kingdom there. After all, Nimrod was the grandson of Ham while Peleg lived later as part of the fourth generation after Shem.