What Does Genesis 28:9 Mean?

So Esau went to Ishmael and took as his wife, besides the wives he had, Mahalath the daughter of Ishmael, Abraham's son, the sister of Nebaioth. Esau's solution to the problem of Canaanite wives is to add an Abrahamic wife: he marries Ishmael's daughter. Ishmael was Abraham's firstborn, rejected from the covenant (Genesis 21:10-12) but blessed by God nonetheless (Genesis 21:13, 17:20). By marrying into Ishmael's family, Esau is attaching himself to the Abrahamic line through its non-covenant branch.

The marriage to Mahalath is Esau's attempt at course-correction, but it reveals his fundamental misunderstanding of the covenant. The problem was not simply that his first wives were Canaanite; the problem was that his entire life-pattern had placed him outside the stream of the Abrahamic blessing. Adding a wife from the non-covenant Abrahamic branch does not restore the blessing he has lost. He adds a third wife rather than replacing the first two. The gesture is sincere but insufficient; it treats the symptom rather than the condition.

Mahalath is also called Basemath in Genesis 36:3, a variant name common in patriarchal name lists. She is named the sister of Nebaioth, Ishmael's firstborn (Genesis 25:13), which gives her high status within the Ishmaelite clan. The marriage alliance between Esau's family and the Ishmaelite line eventually becomes part of the background for the Edomite and Arabian peoples who share adjacent territories in the biblical world. Esau's attempt at resolution points outward toward the nations even as it fails to recover the lost blessing.