Tosefta Peah, 4:8

One gives to a poor person who travels from place to place no less than a loaf of bread worth a dupondium, [made from wheat which costs at least] one sela for four seahs. If the poor person stayed overnight, one gives enough for a night’s lodging, oil, and legumes. [If the poor person] stays for Shabbat, one gives food for three meals, oil, legumes, fish, and a vegetable. To what does this refer? When one does not recognize the poor person, but when one does recognize the poor person, one should even cover the person. If the poor person was going around the entrances [of houses] to beg, one doesn’t owe them anything. [Translation by Uri L’Tzedek. Edited for gender neutrality.]