Related for Menachot 5:2
כָּל הַמְּנָחוֹת נִלּוֹשׁוֹת בְּפוֹשְׁרִין, וּמְשַׁמְּרָן שֶׁלֹּא יַחֲמִיצוּ. וְאִם הֶחֱמִיצוּ שְׁיָרֶיהָ, עוֹבֵר בְּלֹא תַעֲשֶׂה, שֶׁנֶּאֱמַר (ויקרא ב), כָּל הַמִּנְחָה אֲשֶׁר תַּקְרִיבוּ לַה' לֹא תֵעָשֶׂה חָמֵץ. וְחַיָּבִים עַל לִישָׁתָהּ, וְעַל עֲרִיכָתָהּ, וְעַל אֲפִיָּתָהּ:
All grain offerings must be kneaded with lukewarm water. He must guard them lest they become leavened. If the remainder became leavened he has transgressed a negative commandment, for it is written, “No grain offering which you shall bring to the Lord shall be made leavened” (Leviticus 2:11). One is liable for the kneading, and for rolling and for baking [if he performed these after it became leavened].
Tosefta Pesachim
One may not knead matzah using boiling water because it parboils (i.e., causes the outer shell of the wheat kernel to leaven, see Y. Pes. II.7.4, Guggenheimer), nor using lukewarm water because it causes it to ferment, but one may knead it using cold water. One may not knead matzah using any other type of liquid, and if [one does begin to so] knead it, he may bake it immediately [without rendering it chametz], but Rabbi Meir forbids it. But one may spread any of these [liquids] on it (i.e., on the surface of the matzah dough, see Pes. 36a:9).
Ask RabbiBookmarkShareCopy