David being at Ziklag receiveth tidings by an Amalekite of Saul and Jonathan’s death: the messenger pretendeth himself to have killed Saul, 1-12. David causeth him to be put to death, 13-16; Saul and Jonathan with a song, 17-27.
Poole's Outline of 2 Samuel 1: David's Reaction to the Death of Saul
Matthew Henry: 'In the close of the foregoing book (with which this is connected as a continuation of the same history) we had Saul's exit; he went down slain to the pit, though he was the terror of the mighty in the land of the living. We are now to look towards the rising sun, and to enquire where David is, and what he is doing. In this chapter we have, I. Tidings brought him to Ziklag of the death of Saul and Jonathan, by an Amalekite, who undertook to give him a particular narrative of it, verses 1-10. II. David's sorrowful reception of these tidings, verses 11-12. III. Justice done upon the messenger, who boasted that he had helpe…