Philo Judaeus In Flaccum 40

[40] when Flaccus heard, or rather when he saw this, he would have done right if he had apprehended the maniac and put him in prison, that he might not give to those who reviled him any opportunity or excuse for insulting their superiors, and if he had chastised those who dressed him up for having dared both openly and disguisedly, both with words and actions, to insult a king and a friend of Caesar, and one who had been honoured by the Roman senate with imperial authority; but he not only did not punish them, but he did not think fit even to check them, but gave complete license and impunity to all those who designed ill, and who were disposed to show their enmity and spite to the king, pretending not to see what he did see, and not to hear what he did hear.