(Read Psalm 6:8-10)

What a sudden change is here! Having made his request known to God, the psalmist is confident that his sorrow will be turned into joy. By the workings of God’s grace upon his heart, he knew his prayer was accepted, and did not doubt but it would, in due time, be answered. His prayers will be accepted, coming up out of the hands of Christ the Mediator. The word signifies prayer made to God, the righteous Judge, as the God of his righteousness, who would plead his cause, and right his wrongs. A believer, through the blood and righteousness of Christ, can go to God as a righteous God, and plead with him for pardon and cleansing, who is just and faithful to grant both. He prays for the conversion of his enemies, or foretells their ruin.

For a more detailed summary select the link below.

Psalm 6 Bible Commentary – Matthew Henry (concise) (christianity.com)

Psalm 6:9

Yahweh has heard my supplication. Yahweh accepts my prayer.