How could David be so certain of his own righteousness? (Psalm 18:20–24) In the Old Testament, Israel could know God’s moral will for his people through the laws set forth in the covenant made at Mount Sinai (Ex 20:1—24:18; Lev 26:1–46; Dt 4:1—11:32). If David lived in a manner consistent with those covenant stipulations, he could legitimately speak of his righteousness. David