Charles Ellicott Commentary Genesis 36:35

"And Husham died, and Hadad the son of Bedad, who smote Midian in the field of Moab, reigned in his stead: and the name of his city was Avith." — Genesis 36:35 (ASV)

Who smote Midian ... — All memory of this exploit has passed away, and the complete silence of the Bible regarding every one of these kings, makes it probable that they belonged to an early date prior to the time in Israel when historical events were carefully recorded.