Ps 66:3

“What followeth because the Salvation of God is known in all nations? "Let the peoples confess to Thee, O God" [Psalm 67:3]; "confess to Thee," he saith, "all peoples." There standeth forth a heretic, and he saith, In Africa I have peoples: and another from another quarter, And I in Galatia have peoples. Thou in Africa, he in Galatia: therefore I require one that hath them everywhere. Ye have indeed dared to exult at that voice, when ye heard, "Let the peoples confess to Thee, O God." Hear the following verse, how he speaketh not of a part: "Let there confess to Thee all peoples." Walk ye in the Way together with all nations; walk ye in the Way together with all peoples, O sons of peace, sons of the One Catholic Church, walk ye in the Way, seeing as ye walk. Wayfarers do this to beguile their toil. Sing ye in this Way; I implore you by that Same Way, sing ye in this Way: a new song sing ye, let no one there sing old ones: sing ye the love-songs of your fatherland, let no one sing old ones. New Way, new wayfarer, new song. Hear thou the Apostle exhorting thee to a new song: "Whatever therefore is in Christ is a new creature; old things have passed away, behold they have been made new." A new song sing ye in the way, which ye have learned "on the earth." In what earth? "In all nations." Therefore even the new song doth not belong to a part. He that in a part singeth, singeth an old song: whatever he please to sing, he singeth an old song, the old man singeth: divided he is, carnal he is. Truly in so far as carnal he is, so far he is old; and in so far as he is spiritual, so far new. See what saith the Apostle: "I could not speak to you as if to spiritual, but as if to carnal." [1 Corinthians 3:1] Whence proveth he them carnal? "For while one saith, I am of Paul; but another, I of Apollos: are ye not," he saith, "carnal?" [1 Corinthians 3:4] Therefore in the Spirit a new song sing thou in the safe way. Just as wayfarers sing, and ofttimes in the night sing. Awful round about all things do sound, or rather they sound not around, but are still around; and the more still the more awful; nevertheless, even they that fear robbers do sing. How much more safely thou singest in Christ! That way hath no robber, unless thou by forsaking the way fallest in the hands of a robber. ...Why fear ye to confess, and in your confession to sing a new song together with all the earth; in all the earth, in Catholic peace, dost thou fear to confess to God, lest He condemn thee that hast confessed? If having not confessed thou liest concealed, having confessed thou wilt be condemned. Thou fearest to confess, that by not confessing canst not be concealed: thou wilt be condemned if thou hast held thy peace, that mightest have been delivered, by having confessed. "O God, confess to Thee all peoples."”

“Now follows the prospect of the entrance of all peoples into the kingdom of God, who will then praise Him in common with Israel as their God also. His judging (שׁפט) in this instance is not meant as a judicial punishment, but as a righteous and mild government, just as in the christological parallels Psa 72:12., Isa 11:3. מישׁר in an ethical sense for מישׁרים, as in Psa 45:7; Isa 11:4; Mal 2:6. הנחה as in Psa 31:4 of gracious guidance (otherwise than in Job 12:23).”