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

LXX

Psalms 88:20

Then thou spokest in vision to thy children, and saidst, I have laid help on a mighty one; I have exalted one chosen out of my people.

Parallel Translations

I have found David my servant; I have anointed him by [my] holy mercy.