Commentaries:
Barnes' Notes
O come, let us sing unto the Lord - The word here rendered come, means properly "go;" but it is used here, as it often is, as a formula of invitation, in calling on others to share in what is done by the speaker. It is here to be understood as used by one portion of an assembly convened for worship addressing the other portion, and calling on them to unite in the praise of God.
Let us make a joyful noise - The word used here means commonly to make a loud noise, to shout, Job 30:5. It is especially used
(a) of warlike shouts, Joshua 6:16; I Samuel 17:20;
(b) of the shout of triumph, Judges 15:14;
(c) of the sound or clangor of a trumpet, Numbers 10:9; Joel 2:1.
It may thus be used to denote any shout of joy or praise. In public worship it would denote praise of the most animated kind.
To the Rock of our salvation - The strong ground of our confidence; the basis of our hope; our security. See the notes at Psalms 18:2.
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