"Thankful prayer produces the peace of God"
Philippians 4:6-7
6 Be anxious for nothing, but in everything by prayer and supplication with thanksgiving let your requests be made known to God.
7 And the peace of God, which surpasses all comprehension, will guard your hearts and your minds in Christ Jesus.
New American Standard Bible: 1995 Update. 1995. La Habra, CA: The Lockman Foundation.