Reference for Eruvin 104:4
אמר רב ששת לא תימא טעמא דר"מ ספק עירב ספק לא עירב הוא דהוי חמר גמל אבל ודאי לא עירב לא הוי חמר גמל
- R'Shesheth replied: Do not say that R'Meir's view is that only where it is doubtful whether a man had a valid 'erub or not is he in the position of an ass-driver and a camel-driver and that where it is certain that he prepared no 'erub he is not in such a position; but rather even where it is certain that he prepared no 'erub he is in the position of an ass-driver and camel-driver; for here, surely, it is a cas where It is certain that the man had prepared no 'erub and yet he is put in the position of an ass-driver and a camel-driver. <big><b>MISHNAH: </b></big>HE WHO WENT OUT BEYOND HIS SABBATH LIMIT<span class="x" onmousemove="('comment',' Intentionally and on no religious errand.');"><sup>7</sup></span>