Genesis 25:11,12

God blessed Isaac For the blessing of Abraham did not die with him, but was perpetuated to his posterity, and especially to the children of the promise. The generations of Ishmael God had made some promises concerning him, and this account of his posterity is given that we may know the accomplishment of them. He had twelve sons, the names of whom are here recorded; two of them, Midian and Kedan, we often read of in Scripture. They are termed twelve princes, Genesis 25:16, or heads of families, which, in process of time, became nations, numerous, and very considerable. And his posterity had not only tents in fields, wherein they grew rich in time of peace, but they had towns and castles, wherein they fortified themselves in times of war. Their number and strength were the fruit of the promise made to Hagar, concerning Ishmael, Genesis 16:10; and to Abraham, Genesis 17:20; Genesis 21:13.