they may have departed from what was fitting. For through the doctrine of the aforesaid fathers, the people coming to the knowledge of what is good and desirable, as well as what is useless and to be rejected, will remodel their life for the better, and not be led by ignorance, but applying their minds to the doctrine, they will take heed that no evil befall them and work out their salvation in fear of impending punishment.
Ancient Epitome of Canon XIX.
The prelates of the Church, especially upon Lord's days, shall teach doctrine.
How great an obligation of preaching rests upon bishops, the successors of the Apostles, is evident from the words of St. Paul, "Christ sent me not to baptize but to preach" (1 Cor. i.17), and his chief adjuration to Timothy though Jesus Christ and his coming, was "Preach the Word" (2 Tim. ii.4.). For this reason the fathers formerly called the episcopate the preaching-office (officium predicationis), as is evident from the profession of Adelbert Morinensis, and the form of profession of a future Archbishop. Both of these will be found in Labbe, appendix to Tom. VIII., of his Concilia.
Council of Trent.
(Sess. V., c.2.)
The preaching of the Gospel is the chief work of bishops.
Convocation of Canterbury, a.d.1571.
(Cardwell. Synodalia, Vol. I., p.126.)
The clergy will be careful to teach nothing in their sermons to be religiously held and believed by the people except what is agreeable to the doctrine of the Old and New Testament, and what the Catholic Fathers and Ancient Bishops have collected out of the same. 
Council of Trent.
No one shall dare to interpret the Holy Scripture contrary to the unanimous consent of the fathers.
 I have followed the reading apeiros.  It is not generally known that this evident citation of Canon XIX. of the Quinisext Council forms part of the action enforcing the XXXIX. Articles of the Church of England.
 It is not generally known that this evident citation of Canon XIX. of the Quinisext Council forms part of the action enforcing the XXXIX. Articles of the Church of England.