Reference for Menachot 105:12

והא אפיקתיה לעכב אם כן ליכתוב קרא מצה היא מאי תהיה שמעת מינה תרתי

must be specially watched lest they become leavened?<span class="x" onmousemove="('comment',' They must be continually kneaded till the time of baking (Rashi) .');">¹³</span> Shall we infer it from the Passover concerning which it Is written, And ye shall watch the unleavened bread!<span class="x" onmousemove="('comment',' Ex. XII, 17; so according to Rabbinic interpretation. E.VV.: And ye shall observe the feast of unleavened bread.');">¹⁴</span>

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