Reference for Shabbat 275:7
א"ל אביי מי סברת ר"א אדר"מ קאי דאמר חייבת חטאת אדרבנן קאי דאמרי פטור אבל אסור ואמר להו איהו מותר לכתחילה
where R. Meir imposes a sin-offering. while R. Eliezer gives permission at the very outset. What is this? For it was taught: A woman must not go out with a 'golden city', and if she does go out, she is liable to a sin-offering: this is R. Meir's view: but the Sages rule: She may not go out [with it]. yet if she goes out she is not culpable. R. Eliezer maintained: A woman may go out with a 'golden city' at the very outset! — Said Abaye to him, Do you think that R. Eliezer refers to R. Meir, who rules that she is liable to a sin-offering? He refers to the Rabbis, who maintain that there is no culpability. though it is forbidden; whereupon he said to them, It is permitted at the very outset.<span class="x" onmousemove="('comment',' Abaye's reasoning is difficult to follow unless he means that R. Eliezer was altogether ignorant of R. Meir's view (Tosaf. and marginal Gloss.). ');"><sup>6</sup></span>