May all the kings of the earth give glory to thee: for they have heard all the words of thy mouth.

“"Let all the kings of the earth confess to Thee, O Lord" (ver. 4). So shall it be, and so it is, and that daily; and it is shown that it was not said in vain, save that it was future. But neither let them, when they confess to Thee, when they praise Thee, desire earthly things of Thee. For what shall the kings of the earth desire? Have they not already sovereignty? Whatever more a man desire on earth, sovereignty is the highest point of his desire. What more can he desire? It must needs be some loftier eminence. But perhaps the loftier it is, the more dangerous. And therefore the more exalted kings are in earthly eminence, the more ought they to humble themselves before God. What do they do? "Because they have heard all the words of Thy mouth." In a certain nation were hidden the Law and the Prophets, "all the words of Thy mouth:" in the Jewish nation alone were "all the words of Thy mouth," the nation which the Apostle praiseth, saying, "What advantage hath the Jew? Much every way; chiefly because that unto them were committed the oracles of God." These were the words of God. ...What meant Gideon's fleece? It is like the nation of the Jews in the midst of the world, which had the grace of sacraments, not indeed openly manifested, but hidden in a cloud, or in a veil, like the dew in the fleece. The time came when the dew was to be manifested in the floor; it was manifested, no longer hidden. Christ alone is the sweetness of dew: Him alone thou recognisest not in Scripture, for whom Scripture was written. But yet, "they have heard all the words of thy mouth."”

“for they heard When they heard the words of Your mouth: “You shall not murder; You shall not commit adultery,” they acknowledged the words of Your mouth: “I am [the Lord your God]” and “You shall have no [other god].” It is proper to make them first accept the yoke of His kingdom, and then He should levy all His decrees.”

“All the kings of the earth shall praise thee, O Lord,.... Or "let them confess", or "praise thee" (s); a wish or prayer. Not only the kings known to David, as Kimchi limits it; or that lived in his days, as Hiram and others; but in the latter day, when they shall come to Zion, the church, and be nursing fathers to it, and shall serve and worship the King Messiah, Isa 49:23; when they hear the words of thy mouth; either the promises of it fulfilled not only with respect to David; but the Messiah, and his church and people, in the latter day, even the glorious things spoken thereof: or the doctrines of the Gospel, which are the words of his mouth, and more desirable than thousands of gold and silver; and which, when kings shall hear so as to understand, they will praise the Lord for them; see Isa 52:15. The Targum is, "the words of thy praise.'' (s) "confiteantur tibi", V. L. Pagninus, Montanus.”

“Mouth. All kingdoms shall, sooner or later, become acquainted with the gospel. (Worthington) — The predictions of Jeremias, &c., had been communicated to the neighbouring princes, (Calmet) and all might know that God had executed his threats and promises. (Haydock) — Yet none of them embraced the true religion, soon after the captivity, so that this relates to Christ. (Berthier)”