Philo Judaeus De Josepho 176

[176] Perhaps, too, he bound him because the greatest share of the guilt belonged to him, as he was almost the original author of the plot against him, and as it was he who excited the others to the enmity which they displayed against him; for if he had arrayed himself on the side of the eldest when he gave his merciful and humane counsel, being younger than he, but older than all the rest, perhaps, and indeed most probably, the iniquity would have been checked, in consequence of those who had the highest rank and honour agreeing and co-operating together in the matter, which fact would have carried great weight with it;