Commentary for Kiddushin 115:7
מכרן וקידש בדמיהן מקודשת מנלן מדגלי רחמנא בעבודת כוכבים (דברים ז, כו) והיית חרם כמוהו כל שאתה מהייה הימנה הרי הוא כמוהו מכלל דכל איסורים שבתורה שרו
or if one kills [an animal] and it is discovered to be a trefa, both being hullin in the Temple Court,--R'Simeon holds that benefit is permitted; but the Sages forbid it.<span class="x" onmousemove="('comment',' In R. Simeon's view, if the slaughter does not qualify it for food, because it is otherwise forbidden, it is not slaughter at all, and no interdict which would normally result from the killing takes effect. Therefore one may benefit therefrom and it is valid for betrothal.');"><sup>8</sup></span> IF HE SELLS THEM AND BETROTHS HER WITH THE PROCEEDS, SHE IS BETROTHED. How do we know it? - Since the Divine Law revealed in reference to idolatry, [and thou shalt not bring an abomination into thine house,] lest thou be a cursed thing like it,<span class="x" onmousemove="('comment',' Deut. VII, 26.');"><sup>9</sup></span>