St. Cyril of Jerusalemâs citation from his Fifth Mystagogical Catechesis circa 350 AD, the Synod of Trullo cites in Canon 101:
ST. CYRIL OF JERUSALEM.
(Cateches. Mystagog. v.(1))
When thou goest to receive communion go not with thy wrists extended, nor with thy fingers separated, but placing thy left hand as a throne for thy right, which is to receive so great a King, and in the hollow of the palm receive the body of Christ, saying, Amen.
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