“Clap your hands, all you people; shout to God with a voice of triumph” (v.1)
Hand clapping, shouting, even dancing were common forms of salutations in Israel during a time of national rejoicing. This was commonly seen at the coronation of a king, or the celebration of a great victory. This Psalm may have been written during the return of "the ark” from the house of Obed-edom into the city of Zion, truly a time of national celebration.
We see in our text that the psalmist is summoning not just the nation of Israel to raise their voices in triumph at the return of the ark, but the Gentiles as well. For they will have an equal share in that Kingdom where there is neither Greek nor Jew, but Christ is all and in all where Jehovah rules and reigns.
Therefore, clap your hands, all you people; shout to God with a voice of triumph - for Christ has conquered sin, satan, and death, and now sits at the right hand of the father, crowned with glory and honor, having obtained eternal redemption for all (people) who believe.
The Truth: For I tell you Christ has become a servant of the Jews on behalf of God’s truth, to confirm the promise made to the patriarchs, so that the Gentiles may glorify God for His mercy. As it is written: ’Therefore I will praise You among the Gentiles; I will sing praise to Your name." (Romans 15:8-9)