Longer Catechism (Orthodox) 15.343

Chapter 15 — Part I — The Eucharist

Section 343. Q. Ought we to communicate often in the holy Mysteries? A. The primitive Christians communicated every Lord's Day; but now few have such purity of life as to be always prepared to approach so great a Mystery. Our Mother the Church calls on all, who would live religiously, to confess before their ghostly Father, and communicate in the Body and Blood of Christ, four times yearly, or even every month, but requires all, without exception, to receive it at the least once in the year. (See Orthod. Confess. Pt. I. Q. 90.)