The Book of Samuel 2 concludes with four chapters (chapters 21 to 24) that lie outside the chronological succession narrative of Saul and David, a narrative that will continue in The Book of Kings. These four supplementary chapters cover a great famine during David's reign; the execution of seven of Saul's remaining descendants, only Mephibosheth being saved; David's song of thanksgiving, which is almost identical to Psalm 18; David's last words; a list of David's "mighty warriors"; an offering made by David using water from the well of Bethlehem; David's sinful census; a plague over Israel which David opted for as preferable to either famine or oppression; and the construction of an altar on land David purchased from Araunah the Jebusite.