Tosefta for Pesachim 71:12
ואיבעית אימא לעולם בחלבא כדאמר רבינא כעין תורא שרי הכא נמי כעין תורא:
Now R'Akiba related: I was staying [one Passover] with R'Eliezer and R'Joshua, and I kneaded dough for them with wine, oil or honey, and they said nothing to me. And though one may not knead, yet one may smooth the surface with them, - this is according to the first Tanna.
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).
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