Mishnayos Zevachim Perek 8 Mishnah 10

In a case of the blood of an offering that is to be placed on the altar with one placement that was mixed with the blood of another offering that is to be placed on the altar with one placement, e.g., the blood of a firstborn offering with the blood of another firstborn offering or the blood of an animal tithe offering, the blood shall be placed with one placement. In a case of the blood of an offering that is to be placed on the altar with four placements that was mixed with the blood of another offering that is to be placed on the altar with four placements, e.g., the blood of a sin offering with that of another sin offering, or the blood of a burnt offering with that of a peace offering, the blood shall be placed with four placements. If the blood of an offering that is to be placed on the altar with four placements was mixed with the blood of an offering that is to be placed on the altar with one placement, Rabbi Eliezer says: The blood shall be placed with four placements. Rabbi Yehoshua says: The blood shall be placed with one placement, as the priest fulfills the requirement with one placement after the fact. Rabbi Eliezer said to Rabbi Yehoshua: According to your opinion, the priest violates the prohibition of: Do not diminish, as it is written: “All these matters that I command you, that you shall observe to do; you shall not add thereto, nor diminish from it” (Deuteronomy 13:1). One may not diminish the number of required placements from four to one. Rabbi Yehoshua said to Rabbi Eliezer: According to your opinion, the priest violates the prohibition of: Do not add, derived from the same verse. One may not add to the one required placement and place four. Rabbi Eliezer said to Rabbi Yehoshua: The prohibition of: Do not add, is stated only in a case where the blood is by itself, not when it is part of a mixture. Rabbi Yehoshua said to Rabbi Eliezer: Likewise, the prohibition of: Do not diminish, is stated only in a case where the blood is by itself. And Rabbi Yehoshua also said: When you placed four placements, you transgressed the prohibition of: Do not add, and you performed a direct action. When you did not place four placements but only one, although you transgressed the prohibition of: Do not diminish, you did not perform a direct action. An active transgression is more severe than a passive one.

הַנִּתָּנִין מַתָּנָה אַחַת שֶׁנִּתְעָרְבוּ בַנִּתָּנִין בְּמַתָּנָה אַחַת, יִנָּתְנוּ מַתָּנָה אֶחָת. מַתַּן אַרְבַּע בְּמַתַּן אַרְבַּע, יִנָּתְנוּ בְּמַתַּן אַרְבַּע. מַתַּן אַרְבַּע בְּמַתָּנָה אַחַת, רַבִּי אֱלִיעֶזֶר אוֹמֵר, יִנָּתְנוּ בְמַתַּן אַרְבַּע. רַבִּי יְהוֹשֻׁעַ אוֹמֵר, יִנָּתְנוּ בְמַתָּנָה אֶחָת. אָמַר לוֹ רַבִּי אֱלִיעֶזֶר, וַהֲרֵי הוּא עוֹבֵר עַל בַּל תִּגְרַע. אָמַר לוֹ רַבִּי יְהוֹשֻׁעַ, וַהֲרֵי הוּא עוֹבֵר עַל בַּל תּוֹסִיף. אָמַר לוֹ רַבִּי אֱלִיעֶזֶר, לֹא נֶאֱמַר בַּל תּוֹסִיף אֶלָּא כְשֶׁהוּא בְעַצְמוֹ. אָמַר לוֹ רַבִּי יְהוֹשֻׁעַ, לֹא נֶאֱמַר בַּל תִּגְרַע אֶלָּא כְשֶׁהוּא בְעַצְמוֹ. וְעוֹד אָמַר רַבִּי יְהוֹשֻׁעַ, כְּשֶׁנָּתַתָּ, עָבַרְתָּ עַל בַּל תּוֹסִיף וְעָשִׂיתָ מַעֲשֶׂה בְיָדֶךָ. וּכְשֶׁלֹּא נָתַתָּ, עָבַרְתָּ עַל בַּל תִּגְרַע וְלֹא עָשִׂיתָ מַעֲשֶׂה בְיָדֶךָ: