This was a simple prayer to God. They wanted to gain a victory with God’s right hand. They wanted an answer to their prayer. God loved them so he should rescue them. There always was the presumption of God’s love and trust in that love, even if it was a little demanding.
This Psalm 21 is a psalm of thanksgiving after a victory of David. Once again there is mention of the choir leader as a psalm of David. Yahweh has given strength to the king during the battle. He has helped the king to succeed. Yahweh has given David his heart’s desire. Just as in the preceding psalm, they wanted Yahweh to give David his heart’s desire. Now they are thankful that he has received his heart’s desire. He has not held back from the request of David’s lips. Once again, it is time for the Selah or musical pause for meditation.