12 For the nation or kingdom that will not serve you will perish; it will be utterly ruined.

Read Isaiah 60:12 Using Other Translations

For the nation and kingdom that will not serve thee shall perish; yea, those nations shall be utterly wasted.
For the nation and kingdom that will not serve you shall perish; those nations shall be utterly laid waste.
For the nations that refuse to serve you will be destroyed.