Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
LXX2012

Isaiah 34:6

The sword of the Lord is filled with blood, it is glutted with fat, with the blood of goats and lambs, and with the fat of goats and rams: for the Lord has a sacrifice in Bosor, and a great slaughter in Idumea.

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