Reference for Eruvin 187:2

והא דרב לאו בפירוש אתמר אלא מכללא אתמר דרב ושמואל הוו יתבי בההוא חצר נפל גודא דביני ביני אמר להו שמואל שקולו גלימא נגידו בה

to the very foundation of the wall.<span class="x" onmousemove="('comment',' Unlike Rab, he holds that once the movement of objects in a certain place has been permitted when the Sabbath began the permissibility remains in force until the conclusion of the day.');">³</span> The ruling of Rab, however, was not explicitly stated but was arrived at by implication.

Jastrow