משנה על ערלה 2:1

Rabbi Eliezer says: terumah can be taken out [if it falls into] a hundred and one parts. Rabbi Joshua says: in a hundred and more, and this “more” has no definite measure. Rabbi Yose ben Meshullam says: this ‘more’ must be a kav to a hundred seahs, a sixth [of the seah] which renders the whole as medumma.