Quotation for Pesachim 10:7
מָזְגוּ לוֹ כוֹס שְׁלִישִׁי, מְבָרֵךְ עַל מְזוֹנוֹ. רְבִיעִי, גּוֹמֵר עָלָיו אֶת הַהַלֵּל, וְאוֹמֵר עָלָיו בִּרְכַּת הַשִּׁיר. בֵּין הַכּוֹסוֹת הַלָּלוּ, אִם רוֹצֶה לִשְׁתּוֹת, יִשְׁתֶּה. בֵּין שְׁלִישִׁי לָרְבִיעִי, לֹא יִשְׁתֶּה:
They poured the third cup for him. He recites grace. The fourth cup. He concludes the Hallel over it and he recites "the blessing of the song." [Some say that this is "Nishmath kol chai"; others, that it is "Yehallelucha Hashem kol ma'asecha." The custom is to say both.] Between these cups (the first two and the last two), if he wishes to drink, he may. Between the third and fourth, he may not drink, [lest he become inebriated and be unable to conclude the Hallel. And if one would ask: Might he not already be inebriated, having drunk his fill in the midst of the meal? (The answer:) Wine in the midst of the meal does not inebriate; wine after the meal does.]