18 And their country was from Havilah to Shur which is east of Egypt: they took their place to the east of all their brothers.

Matthew Henry's Commentary on Genesis 25:18

Commentary on Genesis 25:11-18

(Read Genesis 25:11-18)

Ishmael had twelve sons, whose families became distinct tribes. They peopled a very large country that lay between Egypt and Assyria, called Arabia. The number and strength of this family were the fruit of the promise, made to Hagar and to Abraham, concerning Ishmael.