bahir jalasayam gatva
tatopasprsya vag-yatah
vibhajya pavitam sesam
bhunjitasesam ahrtam
"Whatever a sannyasi gets that is edible from a householder's house, he should take outside near some lake or river, and, after offering it to Visnu, Brahma and the sun (three divisions), he should eat the entire offering and should not leave anything for others to eat." This is an injunction for sannyasis given in Srimad-Bhagavatam.