And the Jews undertook to do as they had begun, and as Mordecai had written unto them. They engaged to keep these two days as festivals annually, as they had at this time done; not in a religious but in a civil way, not as parts of religious worship, and as additions to and innovations of the law, but by way of commemoration of a civil benefit which they had received; and yet we find in later times that this was scrupled by some as an innovation; for we are told that there were eighty five elders, and more than thirty of them prophets, who were distressed about this matter, fearing it was an innovation.
T. Hieros. Megillah. fol. 70.