All the blood of the house of Saul; either,
1. The blood of Abner and Ish-bosheth; which he maliciously imputes to David, as if they had been killed by David's contrivance; especially the former, because David did only give Joab hard words, as in policy he was obliged to do; but instead of punishing him, did reward and prefer him. Or,
2. The death of Saul's seven sons, 2 Samuel 21:8, which, though related after this, seems to have been done before; of which See Poole on "2 Samuel 15:7". In thy mischief: the same mischief thou didst bring upon others, is now returned upon thy own head. Or, thy sin hath found thee out, and thou art now receiving the just punishment of it.