Seasonings of two or three names of one type, or of three, are forbidden and com-bine. R' Shimon says: Two or three names of one type or two types of one name do not combine.

Sourdough of chullin and of terumah that fell into a dough, [and] there was not in this one sufficient to leaven and there was not in this one sufficient to leaven, [but] they combined and leavened, R' Eliezer says: “We follow the last one.” But the Sages say: Whether the prohibition fell in the beginning or at the end, it never forbids until in it there is sufficient to leaven.

Yoezer, a man of the Birah, was of the students of Beis Shammai, and he said: I asked Rabban Gamliel the Elder while standing at the East Gate, and he said, “It never forbids unless there is enough of it to leaven.”

Vessels that one lubricated with tamei oil and then went back and lubricated them [again] with tahor oil, or that he lubricated with tahor oil and then went back and lubricated them [again] with tamei oil, R' Eliezer says: “After the first one I come.” But the Sages say: After the last one.essels that one lubricated with tamei oil and then went back and lubricated them [again] with tahor oil, or that he lubricated with tahor oil and then went back and lubricated them [again] with tamei oil, R' Eliezer says: “After the first one I come.” But the Sages say: After the last one.