BT RH 21a(2) :בסים {ונכ}<תב>שילא דבבלאיי ביומא רבא דמערבא‏ : how sweet is the cooked dish of the Babylonians on the Great Day [i.e. the Day of Atonement] of (the calculation) of Eretz Israel
See the entire entry for bassīm adj. sweet