Peace, troubled soul, thou need'st not fear. (Confidence.] We have found this hymn in two forms. The first is in the Pocket Hymn Book, York, Spence, 5th ed., 1786 (possibly earlier), No. 183, in 8 stanzas of 4 lines. This passed into the American collections. The second form begins "Peace, peace, my soul, thou need'st not fear," and is appended to Sermon ii. on Matt. vi. 33, in S. Ecking's posthumous Essays on Grace, &c, Liverpool, W. Jones, 1806, in 7 stanzas of 4 lines. Neither is in the Gospel Magazine, 1779.
--John Julian, Dictionary of Hymnology, Appendix, Part II (1907)