Most writers, however, agree in stating that once a disease, which horribly disfigured the body, broke out over Egypt; that king Bocchoris, seeking a remedy, consulted the oracle of Hammon, and was bidden to cleanse his realm, and to convey into some foreign land this race detested by the gods. The people, who had been collected after diligent search, finding themselves left in a desert, sat for the most part in a stupor of grief, till one of the exiles, Moyses by name, warned them not to look for any relief from God or man, forsaken as they were of both, but to trust to themselves, taking for their heaven-sent leader that man who should first help them to be quit of their present misery.
His Book V Chapter 3: The Jews. Their history according to Tacitus (cont.)

Moyses, wishing to secure for the future his authority over the nation, gave them a novel form of worship, opposed to all that is practised by other men.
His Book V Chapter 4: The Jews. Their religion according to Tacitus