In 1871 Heinrich Graetz, drawing on Mishnaic and Talmudic sources, theorized that there must have been a late 1st century Council of Jamnia which had decided the Jewish canon. This became the prevailing scholarly consensus for much of the 20th century. However, from the 1960s onwards, based on the work of Jack P. Lewis, Sidney Z. Leiman, and others, this view came increasingly into question. In particular, later scholars noted that none of the sources actually mentioned books that had been withdrawn from a canon, and questioned the whole premise that the discussions were about canonicity at all, asserting that they were actually dealing with other concerns entirely.
Jacob Neusner published books in 1987 and 1988 that argued that the notion of a biblical canon was not prominent in second-century Rabbinic Judaism or even later and instead that a "notion of Torah" was expanded to include the Mishnah, Tosefta, Jerusalem Talmud, Babylonian Talmud and midrashim.
Can anyone quote the specific Mishnaic and Talmudic sources here? Are there any additional pre-19th century sources that speak about the Council of Jamnia/Yavneh?
Please note that this question is not asking for arguments supporting or refuting the Council of Jamnia/Yavneh, it is asking for pre-19th century sources.