Reference for Pesachim 8:10
ואימא לרבות לילי חמשה עשר לביעור דסלקא דעתך אמינא ימים כתיב ימים אין לילות לא קא משמע לן אפילו לילות ההוא לא איצטריכא ליה
hold it in suspense the whole of the fifth,<span class="x" onmousemove="('comment',' I.e., in that hour it may neither be eaten, nor need it be burned, but it can be given to animals.');"><sup>16</sup></span> and must burn it at the beginning of the sixth.<span class="x" onmousemove="('comment',' V. infra 11b.');"><sup>17</sup></span> Thus incidentally all agree that leaven is [Scripturally] forbidden from six hours [i.e., noon] and onwards: whence do we know it? - Said Abaye, Two verses are written: Seven days shall there be no leaven found in your houses;<span class="x" onmousemove="('comment',' Ex. XII, 19.');"><sup>18</sup></span> and it is written, even [ak] the first day ye shall put away leaven out of your houses:<span class="x" onmousemove="('comment',' Ibid. 15.');"><sup>19</sup></span> how is this [to be understood]?<span class="x" onmousemove="('comment',' If the leaven is only put away on the first day, as the latter verse implies, there are not seven full days without leaven, as is intimated by the former verse.');"><sup>20</sup></span> It must include the fourteenth [as the day] for removal.<span class="x" onmousemove="('comment',' I.e., 'first' must mean the first (immediately) preceding day before the seven; cf. infra 5a.');"><sup>21</sup></span> Yet say that it includes the night of the fifteenth [as the time] for removal; for one might argue, 'days' is written, [implying] only days but not nights: hence it [the verse] informs us that even nights [are included in the interdict]?<span class="x" onmousemove="('comment',' Thus 'yet at the first day', etc., may mean that at the very beginning of the seven days, i.e., on the evening of the fifteenth, all leaven must be removed, but there is no prohibition for any part of the fourteenth.');"><sup>22</sup></span> - That is unnecessary,