NET
12 “This is what the Sovereign Lord says: ‘Edom has taken vengeance against the house of Judah; they have made themselves fully culpable by taking vengeance on them.
Darby
12 Thus saith the Lord Jehovah: Because Edom hath dealt against the house of Judah by taking vengeance, and hath made himself very guilty, and revenged himself upon them,
KJV
12 Thus saith the Lord GOD; Because that Edom hath dealt against the house of Judah by taking vengeance, and hath greatly offended, and revenged himself upon them;