O God! to Whom the happy dead. J. Conder. [All Saints' Day.] Appeared in the Congregational Hymn Book, 1836, No. 171, in 2 stanzas of 6 lines, and headed, "Whose faith follow." In his work The Choir and the Oratory, 1837, p. 230, it was republished as a "Collect," in metre. It is a paraphrase of the words in the prayer "For the whole state of Christ's Church Militant here on earth," in the Office for Holy Communion in the Book of Common Prayer:-
And we also bless Thy Holy Name, for all Thy servants departed this life in Thy faith and fear; beseeching Thee to give us grace so to follow their good examples, that with them we may be partakers of Thy heavenly kingdom: Grant this, 0 Father, for Jesus Christ's sake, our only Mediator and Advocate."
This hymn was repeated in the author's Hymns of Praise, Praye, &c, 1856, p. 106, and is given in several modern hymn-books. In some it reads, "O God, in Whom the happy dead"; in others, "O God with Whom the happy dead; and in others, "O God, to Whom the faithful dead." With these exceptions the text is usually given in its original form.
--John Julian, Dictionary of Hymnology (1907)