Contrary to popular belief, revenge is not only in the scriptures, but also righteous (2 Thessalonians 1:6). The enslavement of the heathens in the first 1000 years of Israel's Kingdom is justified as payback for all of the wickedness that those nations did to the children of Israel throughout history.

Isaiah 14:2


And the people The Israelites. shall take them The other nations. The Israelites will put the heathens into hardcore slavery for 1,000 years (Revelation 20:5) because of all of the evil they have done to the Israelites. At the end of this period, the heathens will be in tribute to the Israelites, but the Edomites will be completely destroyed (Obadiah 1:18).

Strongs concordance

2 Esdras 15:57

Thy children shall die of hunger, and thou shalt fall through the sword: thy cities shall be broken down, and all thine shall perish with the sword in the field.