Acts 16:25 (NASB) But about midnight Paul and Silas were praying and singing hymns of praise to God, and the prisoners were listening to them.
"A Christian is more music / When he prays, / Than spheres, or angel's praises be." -- John Donne (1572-1631)
Edythe Draper, Draper's Book of Quotations for the Christian World, (Wheaton, IL: Tyndale House Publishers, 1992), WORDsearch CROSS e-book, 479.