Charles Ellicott Commentary 1 Samuel 25:43

"David also took Ahinoam of Jezreel; and they became both of them his wives." — 1 Samuel 25:43 (ASV)

David also took Ahinoam of Jezreel. —Jezreel is not the city in Issachar (Joshua 19:18), but a town in the southern part of Canaan, situated in the hill country of Judah, near Maon. The fatal results of this disastrous and unhappy Eastern custom of polygamy, as time went on, showed themselves in King David’s household—a plentiful crop of intrigues, crimes, and murders in the royal palace were the sad fruits of his yielding to the miserable practice, which has always been one of the curses of the East.