Chapter 2, Mishna 6, 7 Scribes, merchants, rabbis and other people engaged in the business of Heaven are exempt from the obligation to perform certain commandments because they’re fulfilling other commandments. Are they obligated in sukkah? Must we nap in our sukkahs? May we nap at all? May we nap or sleep with tefillin on? Is it meritorious to take on unnecessary stringencies?