10הַמַּשְׁקִין יִהְיוּ אַב טֻמְאָה מִדִּבְרֵי תּוֹרָה. כְּגוֹן מֵי חַטָּאת וְרֹק הַזָּב וּמֵימֵי רַגְלָיו. וְיִהְיוּ רִאשׁוֹן לְטֻמְאָה מִדִּבְרֵי תּוֹרָה כְּגוֹן שֶׁנָּגְעוּ בְּאָב מֵאֲבוֹת הַטֻּמְאוֹת. וְכֵן אִם נָגְעוּ הַמַּשְׁקִין בִּוְלַד הַטֻּמְאָה בֵּין אָדָם בֵּין כֵּלִים נִטְמְאוּ מִדִּבְרֵי תּוֹרָה וַהֲרֵי הֵן כָּרִאשׁוֹן לְטֻמְאָה לְטַמֵּא אֲחֵרִים מִדִּבְרֵיהֶן. וְכֵן אִם נָגְעוּ בְּשֵׁנִי בֵּין אָדָם בֵּין כֵּלִים בֵּין בָּאֳכָלִין נַעֲשׂוּ רִאשׁוֹן לְטַמֵּא אֲחֵרִים מִדִּבְרֵיהֶם כְּמוֹ שֶׁבֵּאַרְנוּ. וְיִהְיוּ הַמַּשְׁקִין שְׁלִישִׁי וּרְבִיעִי מִדִּבְרֵיהֶם. כֵּיצַד. אִם נָגַע טְבוּל יוֹם בְּמַשְׁקֵה תְּרוּמָה עֲשָׂאָהוּ שְׁלִישִׁי וְאִם נָגַע בְּמַשְׁקֵה קֹדֶשׁ עֲשָׂאָהוּ רְבִיעִי. וְאֵין אַתָּה מוֹצֵא מַשְׁקִין שְׁנִיּוֹת לְעוֹלָם וְלֹא מַשְׁקֶה שֶׁאֵינוֹ תְּחִלָּה חוּץ מִמַּשְׁקֵה טְבוּל יוֹם אוֹ מְחֻסַּר כִּפּוּרִים בְּקֹדֶשׁ כְּמוֹ שֶׁבֵּאַרְנוּ שֶׁהוּא פּוֹסֵל מִדִּבְרֵיהֶם וְאֵינוֹ מְטַמֵּא:
Liquids, e.g., the water on which the ashes of the red heifer have been sprinkled or the saliva or urine of a zav, may become primary sources of impurity according to Scriptural Law. And they may become primary derivatives of impurity according to Scriptural Law, e.g., if they touched a primary source of impurity. Similarly, if liquids touched a derivative of impurity - whether a person or a k'li - they contract impurity according to Scriptural Law and are considered as primary derivatives to impart impurity to other entities according to Rabbinic decree. Similarly, if liquids touched a secondary derivative of impurity - whether a person, a k'li, or foods, they are considered as primary derivatives to impart impurity to other entities according to Rabbinic decree, as we explained. Similarly, liquids can become third degree derivatives or fourth degree derivatives according to Rabbinic decree. What is implied? If a person who immersed that day touches a liquid that is terumah, he causes it to be considered a third degree derivative. If he touches a consecrated liquid, he causes it to be considered a fourth degree derivative. There is no concept of a liquid being considered as a secondary derivative or indeed, anything other than a primary derivative except liquids touched by or fluids discharged by a person who immersed that day or one who is lacking atonement with regard to consecrated liquids, in which instance, he disqualifies them, but does not make them impure, as we explained.