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So Saul died - and all his house - Every branch of his family that had followed him to the war was cut off; his three sons are mentioned as being the chief. No doubt all his officers were slain.

All his house died together - Not the whole of his family, nor even “all his sons” (see 2 Samuel 2:8-15; 2 Samuel 3:6-15; 2 Samuel 4:1-12). The phrase is perhaps an abbreviation of the expression in the parallel passage of Samuel 1 Samuel 31:6.