Reference for Shabbat 90:11
וטעמא מאי רבה ורב יוסף דאמרי תרווייהו הואיל ואדם קובע לה מקום אמר ליה אביי לרב יוסף והרי כילת חתנים דאדם קובע לו מקום ואמר שמואל משום רבי חייא כילת חתנים
he said in the name of R. Johanan The <i>halachah</i> is as R. Judah: while R. Joshua b. Levi said: The <i>halachah</i> is as R. Simeon. R. Joseph observed: Hence Rabbah b. Bar Hanah said in R. Johanan's name, They said, The <i>halachah</i> is as R. Simeon: they said, but he himself [R. Johanan] did not rule thus. Said Abaye to R. Joseph: And do you yourself not hold that R. Johanan [rules] as R. Judah?<span class="x" onmousemove="('comment',' Even before you heard it from R. Isaac. ');"><sup>20</sup></span> Surely R. Abba and R. Assi visited R. Abba of Haifa,<span class="x" onmousemove="('comment',' A harbour of the Mediterranean sea on the coast of Palestine. ');"><sup>21</sup></span> when a candelabrum fell on R. Assi's robe, but he did not remove it. What is the reason? Surely because R. Assi was R. Johanan's disciple, and R. Johanan held as R. Judah, who maintained [the prohibition of] mukzeh? — You speak of a candelabrum? he replied. A candelabrum is different, for R. Aha b. Hanina said in R. Assi's name: Resh Lakish gave a practical ruling in Zidon: A candelabrum which can be lifted with one hand may be moved; that which requires two hands may not be moved. But R. Johanan said: In the matter of a lamp we accept no other view but R. Simeon's; but as for a candelabrum, whether it can be lifted by one hand or by two, it may not be moved.<span class="x" onmousemove="('comment',' Hence, but for the dictum of R. Isaac, R. Joseph would not have known R. Johanan's view. But now he knows that in all cases R. Johanan ruled as R. Judah, that mukzeh is forbidden, save in the matter of an old lamp, which he holds may be handled, agreeing there with R, Simeon. ');"><sup>22</sup></span> And what is the reason?<span class="x" onmousemove="('comment',' That a candelabrum which requires both hands for lifting may not be moved. ');"><sup>23</sup></span> — Rabbah and R. Joseph both say: Because one appoints a place for it. Said Abaye to R. Joseph, But what of a bridal couch<span class="x" onmousemove="('comment',' Without an overhead awning. V. also T.A. III, 42f, � 122. ');"><sup>24</sup></span> for which [too] one appoints a place, yet Samuel said on R. Hiyya's authority: A bridal couch