Sing we the song of those who stand. J. Montgomery. [Communion of Saints.] Written for the Whitsuntide gathering of the Sheffield Sunday School Union, 1824, and first printed for that occasion. It was included in Montgomery's Christian Psalmist, 1825, No. 560: and, again, in his Original Hymns, 1853, No. 200, in 6 stanzas of 4 lines, and headed, in both instances, "The Church Militant learning the Church Triumphant's Song." It is in somewhat extensive use. See also, Worthy the Lamb for sinners slain.
-- John Julian, Dictionary of Hymnology (1907)