Tosefta על תרומות 10:1

Rabbi Tzadoq testified about a brine of unclean locusts that it is clean and permitted to those who eat teruma. Rabbi Yehoshua and Rabbi Papyas testified on the baker’s sheet that they attached to a joist or a beam or affixed with a nail that it is [susceptible] to impurity, but Rabbi Eliezer deems it not [susceptible] to impurity. If he did not attach it all the way, everyone agrees that it is [susceptible] to impurity. They testified that at first they would say “until Purim.” Rabbi Yehoshua and Rabbi Papyas came and testified that all of Adar is fit for intercalation. Menahem ben Povgi, who was a dyer, testified about the rim of the olive-boiler’s kettle that it is [susceptible] to impurity, but that the one used by dyers is not. At the beginning they would say that the matters were reversed. And when they seated him in the yeshiva, everyone was surprised by him. He said to them, this from that, I am the head of all who come after me.