One has to give kovod, honor to ones main rebbi (teacher). There are many dinim of how this kovod must be shown. One pertaining to the gemoro in eiruvin is that one must not be in a bath house at the ...
That which it says in the Gemorah (Rosh Hashana 16b) that one has a obligation of "kabbalos pnei rabo" (to go see ones rebbe) on holidays - when is the obligation? Is there an obligation every day, or ...