Caius,
Ante-Nicene Fathers Vol. V, Fragments of Caius…
(1885)
“ Pliny, in his letter to Trajan, also states that the Christians were accustomed to meet together and sing hymns to Christ. [2] Hippolytus also may be understood to refer to these hymns and psalms towards the close of his oration on the end of the world, [3] where he says: ‘Your mouth I made to give glory and praise, and to utter psalms and spiritual songs.’ A hymn of this kind in honour of Jesus Christ, composed by Clement of Alexandria, is extant at the end of his books entitled Pædagogi. ”
