Reference for Pesachim 10:1
עַרְבֵי פְסָחִים סָמוּךְ לַמִּנְחָה, לֹא יֹאכַל אָדָם עַד שֶׁתֶּחְשָׁךְ. וַאֲפִלּוּ עָנִי שֶׁבְּיִשְׂרָאֵל לֹא יֹאכַל עַד שֶׁיָּסֵב. וְלֹא יִפְחֲתוּ לוֹ מֵאַרְבַּע כּוֹסוֹת שֶׁל יַיִן, וַאֲפִלּוּ מִן הַתַּמְחוּי:
On Pesach eve before minchah [i.e., a little before minchah, about a half hour, in the beginning of the tenth hour. For the tamid is sacrificed at nine and a half hours, which is the time of the minchah, so that a half hour before minchah is at the beginning of the tenth hour], one may not eat until it gets dark, [so that he eat matzah "with appetite," for hiddur mitzvah ("the gracing of the mitzvah"). It goes without saying that he may not eat bread, for chametz is forbidden from six hours on. And (he may not eat) matzah, too, as stated in Yerushalmi: "Eating matzah on Pesach eve is like living with one's betrothed in the house of his in-laws." The intent is, rather, that he may not eat any food, that he not "fill his belly" with it.] And even a poor man in Israel may not eat (the Pesach feast) without reclining [at table on a bolster, in the manner of free men], and they [charity collectors, who provide for the poor] may not provide him with fewer than four cups of wine — even [one who is supported] by the tamchui (the community dole) [i.e., the poorest of the poor, viz. (Peah): "If one has enough for two meals, he may not take from the tamchui."]