Reference for Yoma 160:4
מתקיף לה רבי זירא בשר שמן בככותבת ולולבי גפנים בככותבת א"ל אביי קים להו לרבנן דבהכי מיתבא דעתיה בציר מהכי לא מיתבא דעתיה מיהו בשר שמן טובא לולבי גפנים פורתא
Raba asked a strong question: The quantity of an olive, during the time one could eat a peras,<span class="x" onmousemove="('comment',' Peras, lit., 'a piece (of bread) ' is in the Tosef. Neg. VII, 10 defined as half a loaf, three of which make a kab. The time it takes to eat such a quantity is the maximum within which morsels of food smaller than the minimum measure are considered to join in order to make up the minimum incurring penalty.');"><sup>3</sup></span> - and the quantity of a date during the time required for eating a peras!<span class="x" onmousemove="('comment',' Ought not a longer period to be allowed for the quantity of a date?');"><sup>4</sup></span>