Let him never turn away (a stranger) from his house, that is the rule. Therefore a man should by all means acquire much food, for (good) people say (to the stranger): 'There is food ready for him.' If he gives food amply, food is given to him amply. If he gives food fairly, food is given to him fairly. If he gives food meanly, food is given to him meanly.

In plain words: Never turn away a guest or stranger from your home; that is the rule, so keep plenty of food on hand to share. What you give comes back to you: give generously and you receive generously, give stingily and you receive stingily.