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

Isaiah 2:3

And many nations shall go and say, Come, and let us go up to the mountain of the Lord, and to the house of the God of Jacob; and he will tell us his way, and we will walk in it: for out of Sion shall go forth the law, and the word of the Lord out of Jerusalem.

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