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

Psalms 55:1

(56) For the end, concerning the people that were removed from the sanctuary, by David for a memorial, when the Philistines caught him in Geth. Have mercy upon me, O God; for man has trodden me down; all the day long he warring has afflicted me.

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