O Thou Who hast Thy servants [children] taught. H. Alford. [Fruits of Holiness.] First published in his Psalms & Hymns, 1844, No. 61, in 4 stanzas of 4 lines, for the 8th Sunday after Trinity, and again in his Year of Praise, 1867, No. 47, for the 3rd Sunday after Epiphany. Another form to adapt it for children is, "O Thou Who hast Thy children taught." It is composed of stanzas i., iv. slightly altered.
--John Julian, Dictionary of Hymnology (1907)