Comentario sobre Menajot 3:3
שְׁתֵּי מְנָחוֹת שֶׁלֹּא נִקְמְצוּ, וְנִתְעָרְבוּ זוֹ בָזוֹ, אִם יָכוֹל לִקְמֹץ מִזּוֹ בִּפְנֵי עַצְמָהּ וּמִזּוֹ בִּפְנֵי עַצְמָהּ, כְּשֵׁרוֹת. וְאִם לָאו, פְּסוּלוֹת. הַקֹּמֶץ שֶׁנִּתְעָרֵב בְּמִנְחָה שֶׁלֹּא נִקְמְצָה, לֹא יַקְטִיר. וְאִם הִקְטִיר, זוֹ שֶׁנִּקְמְצָה, עָלְתָה לַבְּעָלִים, וְזוֹ שֶׁלֹּא נִקְמְצָה, לֹא עָלְתָה לַבְּעָלִים. נִתְעָרֵב קֻמְצָהּ בִּשְׁיָרֶיהָ אוֹ בִשְׁיָרֶיהָ שֶׁל חֲבֶרְתָּהּ, לֹא יַקְטִיר. וְאִם הִקְטִיר, עָלְתָה לַבְּעָלִים. נִטְמָא הַקֹּמֶץ וְהִקְרִיבוֹ, הַצִּיץ מְרַצֶּה. יָצָא וְהִקְרִיבוֹ, אֵין הַצִּיץ מְרַצֶּה, שֶׁהַצִּיץ מְרַצֶּה עַל הַטָּמֵא, וְאֵינוֹ מְרַצֶּה עַל הַיּוֹצֵא:
Dos ofrendas de granos de las cuales aún no se habían sacado los puñados se combinaron: si aún es posible tomar el puñado de cada uno por separado, son válidos; Si no, no son válidos. Si el puñado [de una ofrenda de grano] se mezcló con una ofrenda de grano de la cual aún no se había tomado el puñado, no debe quemarlo. Si lo quemó, entonces la ofrenda de grano de la que se tomó el puñado cumple con la obligación del propietario, mientras que la otra de la cual no se tomó el puñado no cumple con la obligación del propietario. Si el puñado se mezcló con el resto de la ofrenda de granos o con el resto de otra ofrenda de granos, no debe quemarse; Si lo hizo, sí cumple con la obligación del propietario. Si el puñado se había vuelto inmundo y, sin embargo, lo ofreció, la placa de la cabeza [del Sumo Sacerdote] lo hace aceptable, pero si salió [de la Corte del Templo] y luego lo ofreció, la placa de la cabeza no lo hace aceptable. Porque la placa de cabeza hace aceptable solo una ofrenda que era inmunda pero no la que fue sacada.
Bartenura on Mishnah Menachot
English Explanation of Mishnah Menachot
If the handful [of a minhah] was mixed with a minhah from which the handful had not yet been taken, he must not burn it. If he did burn it, then the minhah from which the handful had been taken fulfills the owner's obligation while the other from which the handful had not been taken does not fulfill the owner's obligation.
If the handful was mixed with the remainder of the minhah or with the remainder of another minhah, it must not be burned; If he did burn it does fulfill the owner's obligation.
If the handful had become unclean and yet he offered it, the head plate renders it acceptable,
But if it went out [of the Temple Court] and was afterwards he offered it, the headplate does not render it acceptable.
For the headplate renders acceptable only an offering which was unclean but not that which was taken out.
Section one: In order for the minhah to be validated, the handful must be removed. So if two minhahs are mixed in together and neither has their handful removed, each minhah will be permitted only if he can definitely remove a handful from each minhah, and he can tell that this handful comes from only one minhah. If it is impossible to tell which minhah is which, then neither is valid because he can’t tell whether he has removed a handful from each.
Section two: Here a handful from one minhah is mixed in with another minhah from which the handful has not been removed. He should not burn this entire mixture because only the handful is supposed to be burned, not the remainder of the minhah offering. He also cannot remove two handfuls because in each handful there may be flour from the other minhah.
However, if he does burn the entire mixture the minhah which had the handful removed counts as fulfilling the obligation of its owners because its handful was properly burned. The other minhah does not fulfill the owner’s obligation because it was completely burned and only the handful should have been burned.