Manetho, an Egyptian historian, wrote that the Jews were expelled Egyptian lepers who had been taught by Moses "not to adore the gods." The same themes appeared in the works of Chaeremon, Lysimachus, Poseidonius, Apollonius Molon, and in Apion and Tacitus. Agatharchides of Cnidus wrote about the "ridiculous practices" of the Jews and of the "absurdity of their Law," and how Ptolemy Lagus was able to invade Jerusalem in 320 BCE because its inhabitants were observing the Sabbath.[2]