Flavius Josephus, Antiquities of the Jews
William Whiston, A.M., Ed.

[44] Hereupon Clement openly commended Cherea's intentions, but bid him hold his tongue; for that in case his words should get out among many, and such things should be spread abroad as were fit to be concealed, the plot would come to be discovered before it was executed, and they should be brought to punishment; but that they should leave all to futurity, and the hope which thence arose, that some fortunate event would come to their assistance; that, as for himself, his age would not permit him to make any attempt in that case. "However, although perhaps I could suggest what may be safer than what thou, Cherea, hast contrived and said, yet trow is it possible for any one to suggest what is more for thy reputation?" So Clement went his way home, with deep reflections on what he had heard, and what he had himself said. Cherea also was under a concern, and went quickly to Cornelius Sabinus, who was himself one of the tribunes, and whom he otherwise knew to be a worthy man, and a lover of liberty, and on that account very uneasy at the present management of public affairs, he being desirous to come immediately to the execution of what had been determined, and thinking it right for him to propose it to the other, and afraid lest Clement should discover them, and besides looking upon delays and puttings off to be the next to desisting from the enterprise.