Reference for Sanhedrin 56:23

אמר ליה זיל קניה בעדי מסירה כר' אלעזר

is neither the opinion of R.Judah nor that of R. Jose! — 32 Hence this must be the meaning: A step-sonhimself; but as for a brother-in-law, his son and son-in-law too [are included];whereas R. Jose ruled: A brother-in-law himself, and <i>a fortiori</i> his step-son.The Mishnah<span class="x" onmousemove="('comment',' That the exclusion of one's brother-in-law is extended to his son and son-in-law. ');">³³</span>

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