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

Joel 2:17

Between the porch and the altar let the priests that minister to the Lord weep, and say, Spare thy people, O Lord, and give not thine heritage to reproach, that the heathen should rule over them, lest they should say among the heathen, Where is their God?

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