Psalms 51:14 - Coke's Commentary on the Holy Bible

Deliver me from blood-guiltiness— This is the proper sense of the expression. The Hebrew דמים damim, is bloods, in the plural; which generally signifies murder. See 2 Samuel 16:7-8.; Psalms 59:2-3.; Ezekiel 7:23. The meaning of the petition here is, "Deliver me from the bloods I have unrighteously spilled; from the guilt of Uriah's murder." Thy righteousness here signifies thy truth; veracity, and steadfastness to the promises which God had given. He further prays, Open thou my lips, &c. Psalms 51:15. "Remember thy gracious promises, and accomplish them, notwithstanding my unworthiness, that I may have renewed reasons to celebrate thy praises:" for this is the meaning of God's opening his lips; furnishing him with new motives and occasions of gratitude and thankfulness; Chandler. Mudge thinks that bloods does not mean blood spilled, but that debt of blood whereby a man is rendered guilty of death for any capital crime; such as, adultery, &c.