Charles Ellicott Commentary Psalms 51:14

"Deliver me from bloodguiltiness, O God, thou God of my salvation; [And] my tongue shall sing aloud of thy righteousness." — Psalms 51:14 (ASV)

Bloodguiltiness ... —Literally, as in the margin, bloods. So in the Septuagint and in the Vulgate, but thus hardly making it clear whether the word implies the guilt of blood already shed or anticipated violence. The latter would rather have taken the form of Psalms 59:2, from men of blood. Probably we should read from death, as in Psalms 56:13.