Reference for Zavim 1:1
הָרוֹאֶה רְאִיָּה אַחַת שֶׁל זוֹב, בֵּית שַׁמַּאי אוֹמְרִים, כְּשׁוֹמֶרֶת יוֹם כְּנֶגֶד יוֹם. וּבֵית הִלֵּל אוֹמְרִים, כְּבַעַל קֶרִי. רָאָה אַחַת, וּבַשֵּׁנִי הִפְסִיק, וּבַשְּׁלִישִׁי רָאָה שְׁתַּיִם אוֹ אַחַת מְרֻבָּה כִשְׁתַּיִם, בֵּית שַׁמַּאי אוֹמְרִים, זָב גָּמוּר. וּבֵית הִלֵּל אוֹמְרִים, מְטַמֵּא מִשְׁכָּב וּמוֹשָׁב, וְצָרִיךְ בִּיאַת מַיִם חַיִּים, וּפָטוּר מִן הַקָּרְבָּן. אָמַר רַבִּי אֱלִיעֶזֶר בֶּן יְהוּדָה, מוֹדִים בֵּית שַׁמַּאי בָּזֶה שֶׁאֵינוֹ זָב גָּמוּר. וְעַל מַה נֶּחְלְקוּ, עַל הָרוֹאֶה שְׁתַּיִם אוֹ אַחַת מְרֻבָּה כִשְׁתַּיִם, וּבַשֵּׁנִי הִפְסִיק, וּבַשְּׁלִישִׁי רָאָה אַחַת, בֵּית שַׁמַּאי אוֹמְרִים, זָב גָּמוּר. וּבֵית הִלֵּל אוֹמְרִים, מְטַמֵּא מִשְׁכָּב וּמוֹשָׁב, וְצָרִיךְ בִּיאַת מַיִם חַיִּים, וּפָטוּר מִן הַקָּרְבָּן:
One who has seen one discharge of <i>zov</i> [abnormal seminal discharge], Beit Shammai say, he is like a [woman] who observes [for emissions] a day against a day [whatever he lies or sits on becomes unclean]. Beit Hillel say he is like a <i> ba'al keri</i> [one who had an emission of semen whether by nocturnal emission or by sexual activity; whatever he lies or sits on does not become unclean]. If he saw [a discharge] one day and on the second day it stopped and then on the third day saw two [discharges] or one [discharge] as profuse as two, Beit Shammai say he is a full fledged <i>zav</i> [a male who has seen the discharge which renders him unclean]. Beit Hillel say, he renders unclean those item he sits or lies upon and he requires immersion in running water but he does not have to bring a sacrifice. Rabbi Elazar the son of Yehuda said, Beit Shammai agree in this case that he is not a full fledged <i>zav</i>, rather they disagree in a case where [on the first day] he sees two [discharges] or one [discharge] as profuse [the volume] as two , and on the second day it stopped and then on the third day [he once again] had one discharge, [in this case] Beit Shammai say he is a full fledged <i>zav</i> and Beit Hillel say, he renders unclean those item he sits or lies upon and he requires immersion in running water but he does not have to bring a sacrifice.