A lot is said about Abraham and Sarah. After Sarah died Abraham had a second marrage to Keturah.
Gen 25:1 Then again Abraham took a wife, and her name was Keturah.
Gen 25:2 And she bare him Zimran, and Jokshan, and Medan, and Midian, and Ishbak, and Shuah.
Sarah had died at the age of one hundred twenty seven years, so Abraham was then one hundred thirty six and still going. He took a wife, Keturah meaning "incense" and she bore him six sons.He lived to be one hundred seventy five years of age,
Gen 25:7 And these are the days of the years of Abraham's life which he lived , an hundred threescore and fifteen years.
Let's look at the children of Abraham and Keturah.
Zimran means "musician"
Jokshan means "snarer"
Medan means "contention"
Midian means "strife"
Ishbak means "empty or exhausted"
Shuah means "wealth"
The Midianites would become enemies of Israel. They raided their land stealing the crops and the livestock.
Judg 6:1 And the children of Israel did evil in the sight of the LORD: and the LORD delivered them into the hand of Midian seven years.
Judg 6:2 And the hand of Midian prevailed against Israel: and because of the Midianites the children of Israel made them the dens which are in the mountains, and caves, and strong holds.
Judg 6:3 And so it was, when Israel had sown, that the Midianites came up, and the Amalekites, and the children of the east, even they came up against them;
Judg 6:4 And they encamped against them, and destroyed the increase of the earth, till thou come unto Gaza, and left no sustenance for Israel, neither sheep, nor ox, nor ass.
Judg 6:5 For they came up with their cattle and their tents, and they came as grasshoppers for multitude; for both they and their camels were without number: and they entered into the land to destroy it.
Judg 6:6 And Israel was greatly impoverished because of the Midianites; and the children of Israel cried unto the LORD.
The children of the flesh oppose the children of God's covenant promise.