Saviour, I Thy word believe. A. M. Toplady. [Christ dwelling in Man.] Appeared in his Poems on Sacred Subjects, 1759, No. 8, in 6 stanzas of 8 lines, and based upon the words "He dwelleth with you, and shall be in you." John xiv. 17. It is also in D. Sedgwick's reprint of Toplady's Hymns, &c, 1860. In some American collections, including the Songs for the Sanctuary, 1865, st. iii., iv., are given as "Blessed Comforter, come down," as a hymn for Whitsuntide.
--John Julian, Dictionary of Hymnology (1907)