BT BM 42b(36)var. :אמ׳ רב סמא בריה דרבא דהוה שכריה חלא, רב אשי אמ׳ ב̇{כ}^ב^̇יסי ומשלם ליה דמי ̇{כ}^ב^̇יסי‏ : PN said "his beer became vinegar"; PN2 said "it was with k' and he should pay the cost of k'"
See the entire entry for kysy#2 n.m. a plant