From book 5 of Tacitus’s Histories:
3 1 Most authors agree that once during a plague in Egypt which caused bodily disfigurement, King Bocchoris approached the oracle of Ammon and asked for a remedy, whereupon he was told to purge his kingdom and to transport this race into other lands, since it was hateful to the gods.
So the Hebrews were searched out and gathered together; then, being abandoned in the desert, while all others lay idle and weeping, one only of the exiles, Moses by name, warned them not to hope for help from gods or men, for they were deserted by both, but to trust to themselves, regarding as a guide sent from heaven the one whose assistance should first give them escape from their present distress.
They agreed, and then set out on their journey in utter ignorance, but trusting to chance. Nothing caused them so much distress as scarcity of water, and in fact they had already fallen exhausted over the plain nigh unto death, when a herd of wild asses moved from their pasturage to a rock that was shaded by a grove of trees. Moses followed them, and, conjecturing the truth from the grassy ground, discovered abundant streams of water.
This relieved them, and they then marched six days continuously, and on the seventh seized a country, expelling the former inhabitants; there they founded a city and dedicated a temple.
https://youtu.be/y4SnzwjriGg
Though this figure is now largely dismissed as mythical and his adventures - including the slavery in Egypt interlude and exodus - fictional events, no one seems to have taken the trouble to publish 'doubts' about Moses or the Exodus stories.