The Canons of the Council in Trullo 50

50 Canon L

No one at all, whether cleric or layman, is from this time forward to play at dice. And if any one hereafter shall be found doing so, if he be a cleric he is to be deposed, if a layman let him be cut off.

Notes.

Ancient Epitome of Canon L.

A layman should not play at dice.

This renews canons xlii. and xliij. of the Apostolic canons.

Philip Schaff and Henry Wace (eds.), New York: Christian Literature Publishing Co., 1890-1900. Public domain: English translation first published 1885-1900 (Nicene and Post-Nicene Fathers, Second Series).