Reference for Bava Metzia 183:16

ומר סבר כנפשך מה נפשך אם חסמת פטור אף פועל אם חסמת פטור

R. Ashi said: I repeated the [above] teaching before R. Kahana. [Thereupon] he observed:<span class="x" onmousemove="('comment',' [Following reading of Alfasi and Asheri. Cur. edd. omit 'he observed'. Render accordingly: 'R. Ashi said, I put the (following) question (lit., 'discussion') to R. Kahana. Perhaps etc.' Cf. B.B. 114a; v. Strashun, S.] ');">¹⁴</span>

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