Midrash for Zevachim 71:15
ומי אית ליה לרבי יהודה האי סברא והתניא רבי יהודה אומר (דברים יז, א) דבר רע ריבה כאן חטאת ששחטה בדרום וחטאת שנכנס דמה לפנים פסולה
- In which case should he disagree? In the case of [intending] to break the bones of a Passover-offering and eating thereof half-roast! does then the sacrifice itself become invalid?<span class="x" onmousemove="('comment',' Even if he actually breaks the bones or eats of it half-roast. Surely not, and so the intention does not invalidate it either.');"><sup>18</sup></span>
Sifrei Devarim
(Devarim 17:1) "You shall not sacrifice to the L-rd your G-d an ox or a sheep in which there is a blemish": R. Yehudah says: I might think that if one slaughtered a sin-offering in the south (instead of the north) he transgresses a negative commandment; it is, therefore, written "You shall not sacrifice to the L-rd your G-d a sin-offering in which there is a blemish. For (slaughtering a sin-offering with) a blemish he transgresses a negative commandment, but not for slaughtering it in the south. The sages say: Even for slaughtering a sin-offering in the south he transgresses a negative commandment.
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