2 Samuel 1:6

6. As I happened by chance upon mount Gilboa The account of Saul’s death here given is largely a fabrication of this Amalekite. The true account is given in the last chapter of the preceding book, and wherein the two accounts differ, that is to be regarded as right and this wrong. This is a much more natural supposition than that the compiler found two contradictory documents, and, not knowing which to prefer, inserted both! The messenger expected that David would be greatly pleased to hear of Saul’s death, and to receive the crown and bracelets of his enemy, and that he would honour the man by whose hand that enemy had fallen.