Reference for Eruvin 136:7

דרב דאמר כרבנן ושמואל דאמר כר"א

shall not assume<span class="x" onmousemove="('comment',' By repeated renunciations and the consequent freedom in the moving of objects between courtyards without any further legal preliminaries.');">¹⁹</span> the character of a mockery and jest. [To turn to] the main text: Rab ruled: Renunciation may be followed by renunciation, and Samuel ruled: Renunciation may not be followed by renunciation.<span class="x" onmousemove="('comment',' Supra q.v. notes.');">²⁰</span> Must it be assumed that Rab and Samuel differ on the same principle as that on which the Rabbis and R'Eliezer differed,<span class="x" onmousemove="('comment',' Cf. supra 26b.');">²¹</span>

Jastrow

Jastrow