Reference for Sanhedrin 56:25
ר' יהודה אומר כו': א"ר תנחום א"ר טבלא אמר ר' ברונא אמר רב הלכה כרבי יהודה רבא אמר ר"נ אין הלכה כרבי יהודה וכן אמר רבה בר בר חנה אמר רבי יוחנן אין הלכה כר' יהודה
is R.Jose's.<span class="x" onmousemove="('comment',' Who does not extend the exclusion of a brother-in-law to his son and son-in-law too. However, it must not be taken that R. Jose differs from the Mishnah to the extent of admitting a brother-in-law's son, since he has already been excluded by the ruling: 'The husband of his mother's sister,' which, in other words, means that one may not give evidence for or against his sister-in-law's son, with which ruling he is in agreement, since he supports the view in the Baraitha, that there are twenty-four relations in all, and the above-named is included in that number. He differs however from the Mishnah in that he admits the evidence of one's brother or sister-in-law's son-in-law, since the ruling in the Mishnah, 'one's mother's sister's husband', is not irreconcilable with this opinion. The Mishnah excludes only a mother's sister's husband, not a mother-in-law's sister's husband. V. Rashi and Tosaf. a.l. ');"><sup>35</sup></span>