The Canons of the Council in Trullo; Often Called The Quinisext Council 24Canon XXIV.

No one who is on the priestly catalogue nor any monk is allowed to take part in horse-races or to assist at theatrical representations. But if any clergyman be called to a marriage, as soon as the games begin let him rise up and go out, for so it is ordered by the doctrine of our fathers. And if any one shall be convicted of such an offence let him cease therefrom or be deposed.