Reference for Menachot 171:29
אף כל המנחות היו בדין שיטענו שמן זית זך מה מנורה שאינה לאכילה טעונה שמן זית זך מנחות שהן לאכילה אינו דין שיטענו שמן זית זך תלמוד לאמר (שמות כז, כ) זך כתית למאור ואין זך כתית למנחות
Is not [the text itself of our Mishnah] self-contradictory? The statement THEY ARE POUNDED is in agreement with R'Judah whilst the statement PUT INTO THE BASKET is in agreement with the Rabbis! - This Tanna [of our Mishnah] agrees with R'Judah in one thing and disagrees with him in the other. <big><b>MISHNAH: </b></big>As TO THE FIRST OIL OF THE FIRST CROP, THERE IS NONE BETTER THAN IT. THE SECOND OIL OF THE FIRST CROP AND THE FIRST OIL OF THE SECOND CROP ARE EQUAL. THE THIRD OIL OF THE FIRST CROP. THE SECOND OIL OF THE SECOND CROP. AND THE FIRST OIL OF THE THIRD CROP ARE EQUAL. THE THIRD OIL OF THE SECOND CROP AND THE SECOND OIL OF THE THIRD CROP ARE EQUAL. AS TO THE THIRD OIL OF THE THIRD CROP. THERE IS NONE WORSE THAN IT. BY RIGHT IT COULD BE INFERRED BY THE FOLLOWING ARGUMENT THAT MEAL-OFFERINGS SHOULD REQUIRE THE PUREST OLIVE OIL: IF THE CANDLESTICK, WHICH DOES NOT NEED [THE OIL] FOR EATING, REQUIRES PURE OLIVE OIL, HOW MUCH MORE DO MEAL-OFFERINGS, WHICH [NEED THE OIL] FOR EATING,<span class="x" onmousemove="('comment',' I.e., for burning upon the altar, which is described as 'eating'. cf. Lev. VI, 3.');"><sup>21</sup></span> REQUIRE PURE OLIVE OIL! BUT THE TEXT STATES, PURE OLIVE OIL BEATEN FOR THE LIGHT,<span class="x" onmousemove="('comment',' Ex. XXVII, 20.');"><sup>22</sup></span> BUT NOT 'PURE OLIVE OIL BEATEN FOR MEAL-OFFERINGS.