John Gill

O sing unto the Lord a new song,.... A famous excellent one, suited to Gospel times, on account of the new benefit and blessing of redemption and salvation lately obtained by the Messiah; which should be sung to him, who is the Lord or Jehovah here designed, by all the redeemed ones, Rev 5:9; see Gill on Psa 33:3, the Targum adds, "sing, ye angels on high:'' sing unto the Lord all the earth: not the whole land of Israel only, as Aben Ezra interprets it; though here the Saviour first appeared, taught his doctrines, wrought his miracles, suffered, and died for the salvation of his people; here the angels first begun the new song; and here those that believed in him first expressed that spiritual joy which afterwards spread through the whole world, and who are here called upon to sing; namely, all those that are redeemed from among men, throughout all the earth: believing Gentiles are here intended: the Targum is, "sing before the Lord, all ye righteous of the earth.''