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

Psalms 137:1

A Psalm for David, of Aggæus and Zacharias. I will give thee thanks, O Lord, with my whole heart; and I will sing psalms to thee before the angels; for thou hast heard all the words of my mouth.

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