Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
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Psalms 54:1

For the Chief Musician. On stringed instruments. A contemplation by David, when the Ziphites came and said to Saul, “Isn’t David hiding himself among us?” Save me, God, by your name. Vindicate me in your might.

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