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

Psalms 88:21

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

Parallel Translations

LXX2012View canonical →
For my hand shall support him; and my arm shall strengthen him.
Septuagint in American English (2012)