Definition of a Pauper: One who has less than 200 Zuz worth: Bava Kama 7a-7b
Qualification to collect from Communal Kitchen: Shabbat 118a
Qualification to collect from Regular Charity: Shabbat 118a
"Poverty" Status for a Soldier housed by the government: Pesachim 35b
Better to be a Charity Collector, than to be the one who has to choose how to give out Charity: Shabbat 118b