Hark! those happy voices, saying. [Praise to Jesus.] This hymn, as in modern collections, was given in T. Hastings's Spiritual Songs, 1831 (1836, Nos. 275 and 276), as two hymns, the second being "Bless the Lord of life for ever." In the Plymouth Collection, 1855, the two were united as one hymn (No. 391), and in this form it has been repeated in modern hymnals.
--John Julian, Dictionary of Hymnology, Appendix, Part II (1907)