O God, author of eternal light,
shed forth continual day upon us who watch for you,
that our lips may praise you,
our lives may bless you,
and our meditations in the morning glorify you;
through Jesus Christ our Lord. Amen.
Source: Sarum Missal
Source of this version: Modified from A Lutheran Prayer Book, ed. Doberstein, © 1960 Muhlenberg Press, Philadelphia PA
Also found here: http://kenanderson.net/bible/html/may.html
Graphic: Page from an English Psalter, from Flickr, Walters Art Museum, Public Domain.