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

Zechariah 14:4

And his feet shall stand in that day on the mount of Olives, which is before Jerusalem on the east, and the mount of Olives shall cleave asunder, half of it toward the east and the west, a very great division; and half the mountain shall lean to the north, and half of it to the south.

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