Genesis 10:30
“And their dwelling was from Mesha, as thou goest unto Sephar a mount of the east.”
KJV
Read in Genesis 10Meaning
Joktan's descendants are located in a territory extending from Mesha toward Sephar in the eastern hill country.
Read carefully
The geographic references are ancient and some identifications remain uncertain; the verse's clear function is to associate Joktan's descendants with a defined eastern territory.
Reflection
The genealogy is interested not only in ancestry but also in inhabited space, connecting family memory with the geography of the ancient world.