Matthew Poole and continuators on Proverbs 16:12

12 It is an abomination to kings to commit wickedness ; for the throne is established by righteousness .

They should not onely abstain from all wicked practices, but abhor them both in their own persons, and in all their servants and subjects. It is too plain, that he speaks not of the common practice, but of the duty, of Kings, as on v. 10. And such affirmative expressions are oft used in Scripture to express mens duty onely, as 1 Cor. 6. 19. your body is (i. e. should be) the temple, &c. and 7. 32. careth, &c. i. e. ought to care.

And (which is implied) weakned, and sometimes overthrown by unrighteousness; and therefore this is necessary for their own security and happiness.

Marginal references: Ch. 20. 28. & 25. 5. & 29. 14.