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

Isaiah 58:3

saying, Why have we fasted, and thou regardest not? [why] have we afflicted our souls, and thou didst not know it? Nay, in the days of your fasts ye find your pleasures, and all them that are under your power ye wound.

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