Victorinus of Pettau — on Rev 2:24 (Commentary on the Apocalypse of the Blessed John)

“The fourth class intimates the nobility of the faithful, who labour daily, and do greater works. But even among them also He shows that there are men of an easy disposition to grant unlawful peace, and to listen to new forms of prophesying; and He reproves and warns the others to whom this is not pleasing, who know the wickedness opposed to them: for which evils He purposes to bring upon the head of the faithful both sorrows and dangers; and therefore He says:- "I will not put upon you any other burden." That is, I have not given you laws, observances, and duties, which is another burden.”