A debtor to mercy alone. A. M. Toplady. [Assurance of Faith.] Contributed to the Gospel Magazine, May, 1771, in 3 stanzas of 8 lines, and included in Toplady's Psalms & Hymns, 1776, No. 313, with the alteration, stanza i., line 4, of "offering" to "offerings." In 1860 the 1771 text was included in Sedgwick's reprint of Toplady's Hymns, &c, p. 140. In the older collections it was in most extensive use, both in the Church of England and with many of the Nonconformist bodies, but it is now very generally omitted from modern collections in Great Britain, although in America it still holds a prominent position.
--John Julian, Dictionary of Hymnology (1907)