Nicene and Post-Nicene Fathers, Ser. II, Vol. XIV: The Canons of the Council in Trullo; Often Called The Quinisext Council.: Canon X
A bishop, or presbyter, or deacon who receives usury, or what is called hecatostæ, let him desist or be deposed.
A bishop, presbyter, or deacon who takes usury shall be deposed unless he stops doing so.
See notes on canon XVI. of Nice, and the Excursus thereto appended.