BT BQ 113b(41) :האי דמשתכח בבי דרי, פרע מנתא דמלכא, והני מילי בשותפי‏ : that which (or: he who?) is located on the threshing floor pays off the king's portion, and these statements concern partners
See the entire entry for mənā, mənāṯā/māntā n.f. part, portion