I was interested in anyone knows a mekor not to sit on table, since it is compared to the mizbay’ach? Surely the koihanim walked on the mizbayach in the beit midkash?
regarding your first question,see Berachos 55a,Sefer Chassidim 920,and Kaf Hachaim 167:41 which say that a table is like a mizbeach and one should careful not to kill a louse on it this includes a table which one learns on as well.
Second question,the Be’er Moshe talks about it ,this q has been answered more than once on this site,do a search.