God be in my head, and in my understanding;
God be in my eyes, and in my looking;
God be in my mouth, and in my speaking;
God be in my heart, and in my thinking;
God be at my end, and at my departing.
Source: Attributed to Old Sarum Primer, also attributed to Pynson’s Horae, 1514
Source of this version: http://www.hymnary.org/text/god_be_in_my_head_and_in_my_under
Also found here: The Oxford Book of Prayer, ed. Appleton, © 1985, 1992