That this was the rule of the primitive Church is shown by Tertullian, De Corona Militis, c. iii. “We count fasting or kneeling in worship on the Lord’s day to be unlawful. We rejoice in the same privilege, also, from Easter to Whitsunday.” And even earlier, in a fragment of Irenæus, there is a mention of the fact that Christians abstained from kneeling on Sunday in token of the resurrection. For later testimonies see Ambrose, Ep. 119, ad Januarium. Epiphanius, on Heresies, Book III. (Vol. III. p. 583, ed. Dindorf). Jerome, Dial: Adv. Lucif. c. iv., and the Twentieth Canon of the Council of Nicæa, with Canon Bright’s notes (Notes on the Canons of the First Four General Councils, p. 72).