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

Zechariah 12:6

In that day I will make the captains of thousands of Juda as a firebrand among wood, and as a torch of fire in stubble; and they shall devour on the right hand and on the left all the nations round about: and Jerusalem shall dwell again by herself, [even] in Jerusalem.

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