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

Exodus 23:16

And thou shalt keep the feast of the harvest of first-fruits of thy labours, whatsoever thou shalt have sown in thy field, and the feast of completion at the end of the year in the gathering in of thy fruits out of thy field.

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