Proverbs 20:8 New English Translation

⁸A king sitting on the throne to judge^[a]
separates out^[b] all evil with his eyes.^[c]

Proverbs 20:8 tn The infinitive construct דִּין (din, “to judge”) indicates purpose (so NIV, NCV), even though it does not have a preposition with it.
Proverbs 20:8 tn The second line uses the image of winnowing (cf. NIV, NRSV) to state that the king’s judgment removes evil from the realm. The verb form is מְזָרֶה (m^ezareh), the Piel participle. It has been translated “to sift; to winnow; to scatter” and “to separate”—i.e., separate out evil from the land. The text is saying that a just government roots out evil (cf. NAB “dispels all evil”), but few governments have been consistently just.
Proverbs 20:8 sn The phrase with his eyes indicates that the king will closely examine or look into all the cases that come before him.

New English Translation (NET)