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

Obadiah 1:3

Behold, I have made thee small among the Gentiles: thou art greatly dishonoured. The pride of thine heart has elated thee, dwelling [as thou dost] in the holes of the rocks, [as one that] exalts his habitation, saying in his heart, Who will bring me down to the ground?

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