Commentary for Pesachim 45:17
ורבי יוסי הגלילי לטומאה ולטהרה לא איצטריך קרא כי איצטריך קרא לאיסור ולהיתר ורבי עקיבא איסור והיתר לא צריך קרא כי איצטריך קרא לטומאה ולטהרה
And the other? - One refers to leaven [se'or], and one refers to leavened bread [hamez]. and they are [both] necessary.<span class="x" onmousemove="('comment',' If leaven (se'or) alone were written, I might argue that it is forbidden because its degree of leaven is very strong, but leavened bread (hamez) which is not so strong, is permitted. And if leavened bread (hamez) were written, I would say that that is forbidden because it is fit to be eaten, but not so leaven (se'or) . which cannot be eaten. - Bez. 7b.');"><sup>34</sup></span> Shall we say that it<span class="x" onmousemove="('comment',' Sc. R. Abbahu's ruling.');"><sup>35</sup></span> is dependent on Tannaim? [And the fat of that which dieth of itself, and the fat of tha which is torn of beasts.] may be used for all service [: but ye shall in no wise eat of it].<span class="x" onmousemove="('comment',' Lev. VII, 24.');"><sup>36</sup></span> Why is 'for all service' stated? For I might think, for the service of the Most High let it be permitted, but for secular servic let it be forbidden;<span class="x" onmousemove="('comment',' Since we find fat (heleb) used in the service of God, the fat of a sacrifice being burnt on the altar.');"><sup>37</sup></span> therefore it is stated, 'for all service': this is the view of R'Jose the Galilean. R'A said: For I might think, for secular service let it be clean, [but] for service of the Most High let it be unclean;<span class="x" onmousemove="('comment',' E.g if leather was softened with heleb, sacred food must not be placed on it, for it will thereby be defiled.');"><sup>38</sup></span> therefore it is stated, 'for all service'. Now R'Jose the Galilean [holds] that in respect of uncleanness and cleanness a verse is not required, a verse being required only in respect of what is forbidden and what is permitted. While R'Akiba [maintains]: [in respect of] what is forbidden and what is permitted no verse is required, a verse being required only in respect of uncleanness and cleanness.
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