Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
LXX2012

Psalms 88:34

Neither will I by any means profane my covenant; and I will not make void the things that proceed out of my lips.

Parallel Translations

LXXView canonical →
But my mercy I will not utterly remove from him, nor wrong my truth.
Brenton's Septuagint Translation