Josephus, The Life Against Apion, 2.175

For ignorance he left no pretext. He appointed the Law to be the most excellent and necessary form of instruction, ordaining, not that it should be heard once for all or twice or on several occasions, but that every week men should desert their other occupations and assemble to listen to the Law and to obtain a thorough and accurate knowledge of it, a practice which all other legislators seem to have neglected.