Chasidut for Pesachim 191:25
ופסח דורות נוהג כל שבעה וכו': אמאי קאי אי לימא אפסח פסח כל שבעה מי איכא
Then what is the purpose of 'thereof' [bo]? Only in this case [bo] is the circumcision his males and his slaves indispensable,<span class="x" onmousemove="('comment',' The master may not partake of the Passover-offering until the males of his household are circumcised.');"><sup>33</sup></span> but the circumcision of his males and his slaves is not indispensable in the case of terumah. But if so, when it is written, Neither shall ye break a bone thereof,<span class="x" onmousemove="('comment',' Ex. XII, 46.');"><sup>34</sup></span> does that too [intimate] that he may not break [a bone] thereof, but he may break [a bone] of the annual Passover? -Scripture saith, 'then thou shalt keep [etc.]'. Then what is the purpose of 'thereof'? 'Thereof' [indicates] of a fit [sacrifice], but not of an unfit [one].<span class="x" onmousemove="('comment',' V. supra ');"><sup>35</sup></span> But if so, when it is written, Eat not of it half-roast,<span class="x" onmousemove="('comment',' Ibid. 9.');"><sup>36</sup></span> [does that too intimate,] of it you may not eat [half-roast], but you may eat half-roast of the annual Passover-offering? -Scripture saith, 'then thou shalt keep etc.' Then what is the purpose of 'of it'? - For the teaching of Rabbah in R'Isaac's name.<span class="x" onmousemove="('comment',' Viz., that an uncircumcised person may not eat of tithe; v. Yeb. 74a.');"><sup>37</sup></span> AND WAS EATEN IN HASTE etc. How do we know it? - Because Scripture saith, and ye shall eat it in haste:<span class="x" onmousemove="('comment',' Ibid. 11.');"><sup>38</sup></span> 'it' was eaten in haste, but no other was eaten in haste. AND THE ANNUAL PASSOVER-OFFERING IS KEPT THE WHOLE SEVEN [DAYS] etc. To what does this refer? If we say, to the Passover-offering, - is there then a Passover-offering all the seven [days]?