Adam Clarke's Bible Commentary Verse 2. Show forth his salvation from day to day. ] The original is very emphatic, wt[wy µwyl µwym wrb basseru miyom leyorn yeshuatho "Preach the Gospel of his salvation from day to day." To the same effect the Septuagint, euaggelizesqe hmeran ex hmerav to swthrion autou, "Evangelize his salvation from day to day."
Matthew Henry Commentary
Verses 1-9 - When Christ finished his work on earth, and was received into his glor in heaven, the church began to sing a new song unto him, and to bles his name. His apostles and evangelists showed forth his salvation amon the heathen, his wonders among all people. All the earth is her summoned to worship the Lord. We must worship him in the beauty of holiness, as God in Christ, reconciling the world unto himself Glorious things are said of him, both as motives to praise and matte of praise.
Original Hebrew שׁירו7891 ליהוה3068 ברכו1288 שׁמו8034 בשׂרו1319 מיום3117 ליום3117 ישׁועתו׃3444