The Confessions of Augustine, and others
As I rise from sleep I thank Thee, O Holy Trinity, for through Thy great goodness and patience Thou wast not angered with me, an idler and sinner, nor hast Thou destroyed me in my sins, but hast shown Thy usual love for men, and when I was prostrate in despair, Thou hast raised me to keep the morning watch and glorify Thy power. And now enlighten my mind's eye and open my mouth to study Thy words and understand Thy commandments and do Thy will and sing to Thee in heartfelt adoration and praise Thy Most Holy Name of Father, Son and Holy Spirit, now and ever, and to the ages of ages. Amen.
(Prayer of St. Basil the Great to the Most Holy Trinity)