מִי שֶׁהָיוּ מֵימָיו עַל כְּתֵפוֹ וְעָמַד וְהוֹרָה הוֹרָאָה לַאֲחֵרִים אוֹ שֶׁדָּן דִּין אוֹ שֶׁחָלְצָה בְּפָנָיו אוֹ מֵאֲנָה אוֹ שֶׁהֶרְאָה לַאֲחֵרִים אֶת הַדֶּרֶךְ אוֹ שֶׁהָרַג אֶת נָחָשׁ אוֹ עַקְרָב אוֹ נָטַל אֳכָלִין מִן הַשּׁוּק לְהַצְנִיעָם הֲרֵי הַמַּיִם פְּסוּלִין שֶׁהֲרֵי נִתְעַסֵּק בְּדָבָר אַחֵר קֹדֶם שֶׁיִּתֵּן הָאֵפֶר עַל הַמַּיִם. אֲבָל אִם נָטַל הָאֳכָלִין לְאָכְלָן וַאֲכָלָן כְּשֶׁהוּא מְהַלֵּךְ אוֹ שֶׁהָרַג נָחָשׁ אוֹ עַקְרָב הַמְעַכְּבִין אוֹתוֹ הֲרֵי הַמַּיִם כְּשֵׁרִים שֶׁזֶּה מִצֹּרֶךְ הוֹלָכַת הַמַּיִם. זֶה הַכְּלָל כָּל דָּבָר שֶׁהוּא מִשּׁוּם מְלָאכָה שֶׁעָשָׂהוּ קֹדֶם מַתַּן הָאֵפֶר בֵּין עָמַד בֵּין לֹא עָמַד פָּסַל וְדָבָר שֶׁאֵינוֹ מִשּׁוּם מְלָאכָה אִם לֹא עָמַד כְּשֵׁרִים וְאִם עָמַד פָּסַל. הָיָה מְהַלֵּךְ בְּמַיִם וּפָרַץ בִּשְׁעַת הִלּוּכוֹ מָקוֹם שֶׁיֵּלֵךְ בּוֹ אַף עַל פִּי שֶׁפָּרַץ עַל מְנָת לִגְדֹּר כְּשֵׁרִים. וְאִם גָּדַר קֹדֶם שֶׁיִּתֵּן הָאֵפֶר פְּסוּלִין. וְכֵן אִם קָצָה פֵּרוֹת לֶאֱכל אַף עַל פִּי שֶׁכַּוָּנָתוֹ לְהַקְצוֹת אֶת הַשְּׁאָר כְּשֵׁרִין. וְאִם הִקְצָה קֹדֶם מַתַּן הָאֵפֶר פָּסוּל:
When a person was carrying water for the ashes of the red heifer on his shoulders and he stood and delivered a halachic ruling for others, rendered a judgment, a woman performed chalitzah in his presence, a girl performed mi'un in his presence, he gave directions to others, killed a snake or scorpion that did not present a threat to him, or took food from the market to set aside, the water is disqualified. The rationale is that he occupied himself with another activity before placing the ashes on the water. If, however, he took food in order to eat and ate while he was proceeding on his way or killed a snake or scorpion that was preventing his progress, the water is acceptable, for these activities are necessary to carry the water. This is the general principle: Any activity that is considered as work which was performed before placing the ashes on the water, whether he stood still or not, disqualifies the water. When he performs an activity that is not considered as work, if he does not stand still, the water is acceptable. If he stands still, it is disqualified. If he was walking while carrying such water and, while he was walking, he made an opening to walk through, the water he is carrying is acceptable, even though he made the opening with the intent of closing it afterwards. If he closes it before placing the ashes on the water, the water is disqualified. Similarly, if he dries fruit to eat, even if later he intends to dry the remainder, the water is acceptable. If he dries the remaining fruit before placing the ashes on the water, it is disqualified.
