Sing praises to God, sing praises - This commences the "second" part of the psalm. The "repetition" shows that the heart was full, or was overflowing with joy. It is a call on all to celebrate the praises of God, especially as he had enabled his people to triumph over their enemies.
Sing praises unto our King - Unto God, who has shown himself to be the King of his people - one who rules in their behalf, and who has interposed for their deliverance in danger.

Sing praises - זמרו zammeru: this word is four times repeated in this short verse, and shows at once the earnestness and happiness of the people. They are the words of exultation and triumph. Feel your obligation to God; express it in thanksgiving: be thankful, be eternally thankful, to God your King.

Sing praises to God,.... That is gone up with a shout, Christ Jesus, our ascended Lord and King, as the apostles did at the time of his ascension, Luke 24:52;
sing praises; sing praises unto our King, sing praises: who was then made Lord and Christ, declared King of saints, and crowned with glory and honour; the repetition of the phrase sing praises denotes frequency, constancy, fervency, and great devotion in the performance of this service; and that the ascension of Christ, the occasion of it, is of the greatest moment and importance, and requires it to be performed in such a manner.