We will rejoice in thy salvation Hereby they show their confidence in God, and their assurance of the victory. In the name of our God That is, to the honour of God, we will set up our banners In the way of triumph, which, among other ways, was celebrated by the setting up of banners, or trophies. Now know I, &c. I am already assured of victory by the consideration of God's power and faithfulness, and love to his people. These words seem to have been spoken by David himself; or rather, by the high-priest. The Lord saveth his anointed Will certainly save, with the saving strength of his right hand This shows how God would hear him, even by saving him with a strong hand.
Related Commentaries of Psalms 20:5
Psalms 20:5-6
5 We will rejoice in thy salvation, and in the name of our God we will set up our banners: the LORD fulfil all thy petitions.
6 Now know I that the LORD saveth his anointed; he will hear him from his holyd heaven with the saving strength of his right hand.