In Psalm 30:8–10 David uses an argument for the Lord to return to him. He does not speak about what he did in the past, because that is not a strong argument when you are a sinner. He also does not mention the future, as we sometimes do when we promise something: Lord, I will…
We cannot fulfill those promises. No, David has another argument and that is God’s praise. When the Lord will come back and heal him, he will praise God with his life. The same argument is also used in Psalm 6:5, Psalm 88:10–12 and Psalm 115:17–18.
12 that my glory may sing your praise and not be silent. O LORD my God, I will give thanks to you forever!