A king that sitteth in the throne of judgment - Kings should see to the administration of the laws, as well as of the state transactions, of their kingdom. In the British constitution there is a court for the king, called the King's Bench, where he should sit, and where he is always supposed to be sitting. The eyes - the presence, of the monarch in such a place, scatter evil - he sees into the case himself, and gives right judgment, for he can have no self-interest. Corrupt judges, and falsifying counsellors, cannot stand before him; and the villain is too deeply struck with the majesty and state of the monarch, to face out iniquity before him.

A king that sitteth on the throne of judgment (d) scattereth away all evil with his eyes.
(d) Where righteous judgment is executed, there sin ceases, and vice dare not appear.

A king that sitteth in the throne of judgment,.... That executes judgment himself, as David and Solomon did; who ascends the throne, and sits personally there, and hears and tries causes himself, and not by his servants:
scattereth away all evil with his eyes; all evil men, as the Targum; everyone that is evil, as Aben Ezra: he will easily and quickly discern who is evil, or who is in a bad cause before him, and will pass sentence on him, and drive him away from him with shame and disgrace, and to receive deserved punishment; or he will terrify persons from coming before him with false witness against their neighbour, or with a wrong cause. This may be applied to Christ, the King of kings, and Judge of all; whose eyes are as a flame of fire; who will clearly see into all hearts and actions, when he shall sit on his throne of judgment; and shall pass the righteous and definitive sentence, and shall drive the wicked into hell, into everlasting punishment.

If great men are good men, they may do much good, and prevent very much evil.

As in Proverbs 14:35; Proverbs 16:10, Proverbs 16:15, this is the character of a good king, not of all kings.

The following group begins with a royal proverb, which expresses what a king does with his eyes. Two proverbs, of the seeing eye and the necessary opening of the eyes, close it.
8 A king sitting on the seat of justice,
Scattereth asunder all evil with his eyes.
Excellently the Venet. ἐπὶ θρόνου δίκης, for כּסּא־דין is the name of the seat of rectitude (the tribunal), as the "throne of grace," Hebrews. 4:17, is the name of the capporeth as the seat of mercy; the seat of the judge is merely called כסא; on the other hand, כסא־דין is the contrast of כּסּא הוּות fo, Psalm 94:20 : the seat from which the decision that is in conformity with what is right (cf. e.g., Jeremiah 5:28) goes forth, and where it is sought. As little here as at Proverbs 20:26 is there need for a characterizing adj. to melek; but the lxx hits the meaning for it, understands such to דין: ὅταν βασιλεὺς δίκαιος καθίσῃ ἐπὶ θρόνου. By the "eyes" are we then to understand those of the mind: he sifts, dignoscit, with the eyes of the mind all that is evil, i.e., distinguishes it subjectively from that which is not evil? Thus Hitzig by a comparison of Psalm 11:4; Psalm 139:3 (where Jerome has eventilasti, the Vulg. investigasti). Scarcely correctly, for it lies nearer to think on the eyes in the king's head (vid., Proverbs 16:15); in that case: to winnow (to sift) means to separate the good and the bad, but first mediately: to exclude the bad; finally, Proverbs 20:26 leads to the conclusion that מזרה is to be understood, not of a subjective, but of an actual scattering, or separating, or driving away. Thus the penetrating, fear-inspiring eyes of the king are meant, as Immanuel explains: בראיית עיניו מבריחם מפניו ומפזר אותם בכל פיאה. But in this explanation the personal rendering of כּל־רע is incorrect; for mezareh, meant of the driving asunder of persons, requires as its object a plur. (cf. 26a). Colossians-ra is understood as neut. like Proverbs 5:14. Before the look of a king to whom it belongs to execute righteousness and justice (Isaiah 16:5), nothing evil stands; criminal acts and devices seen through, and so also judged by these eyes, are broken up and scattered to all the winds, along with the danger that thereby threatened the community. It is the command: "put away the evil" (Deuteronomy 13:6 [5]), which the king carries into effect by the powerful influence of his look. With col-ra there is connected the thought that in the presence of the heavenly King no one is wholly free from sin.

His eyes - With his very looks, or by his diligent inspection into affairs.