Talmud for Pesachim 79:13

“Water used by a baker²⁷⁴.Water in which he dips his hands while kneading the dough. This water will contain particles. has to be poured out because it makes leavened.” There are Tannaim who state, he pours it into a depression²⁸²It is presumed that the water will be absorbed into the ground.. There are Tannaim who state, he pours it into a declivity²⁸³Greek adjective καταφερές, “inclined”.. Rebbi Yose said, he who said, he pours it into a depression, if the depression was large. He who said, he pours it into a declivity, if the declivity was consierable. Rebbi Phineas said to him in the name of Rebbi Ila: So was he²⁸⁴In G: “so was my teacher …”. discussing it: If he soaked wheat or barley grains in water, if they became leavened, they are forbidden; if they did not become leavened, they are permitted. Rebbi Yose said, if he soaked barley in water, if they split they are forbidden²⁸⁵Babli 40a.. If he soaked them in vinegar they are permitted since the vinegar contracts them.