Maaseh Rav Siman 114
Can copy this into an AI, or connect the whole library to your assistant. For deeper learning, you can directly use the original seforim, sites, and apps.
לא יקרא לאור הנר כ"א שנים בספר אחד ולא באופן אחר:
Sefaria Community Translation
Do not read from the light of a candle unless you read a book in with two candles and not any other way