In Context

2 The Lord is angry with all nations; his wrath is upon all their armies. He will totally destroy them, he will give them over to slaughter.

3 Their slain will be thrown out, their dead bodies will send up a stench; the mountains will be soaked with their blood.

4 All the stars of the heavens will be dissolved and the sky rolled up like a scroll; all the starry host will fall like withered leaves from the vine, like shriveled figs from the fig tree.

5 My sword has drunk its fill in the heavens; see, it descends in judgment on Edom, the people I have totally destroyed.

6 The sword of the Lord is bathed in blood, it is covered with fat- the blood of lambs and goats, fat from the kidneys of rams. For the Lord has a sacrifice in Bozrah and a great slaughter in Edom.

7 And the wild oxen will fall with them, the bull calves and the great bulls. Their land will be drenched with blood, and the dust will be soaked with fat.

Isaiah 34:5 in Other Translations