佛祖統紀 33.42

33.42

六道斛　淨名經云。以一食施一切（言一切則全收六道）供養諸佛及眾賢聖。然後可食。南岳隨自意三昧云。凡得食應云。此食色香味。上供十方佛。中奉諸賢聖。下及六道品。等施無差（楚宜反不齊也）別。天台觀心食法。鳴鐘後斂手供養一體三寶。次出生飯稱施六道。此皆等供十界。即是今人施六道修水陸供之明證也。

The Bushel Offering for the Six Destinies: The Vimalakīrti-nirdeśa-sūtra states, 'Giving a single meal to all (stating "all" entirely encompasses the six destinies) and offering to the Buddhas and the assembly of wise and noble ones, only then may one eat.' Nanyue's Sui ziyi sanmei states, 'Whenever one receives food, one should say: "The color, fragrance, and flavor of this food are offered above to the Buddhas of the ten directions, in the middle to the assembly of wise and noble ones, and below to the classes of the six destinies; distributed equally without distinction."' The Tiantai Method of Contemplating the Mind at Meals states that after sounding the bell, one joins one's hands in offering to the unitary Three Jewels, and next takes out raw rice, declaring it as an offering to the six destinies. These all make equal offerings to the ten realms; this is clear proof for people today distributing [food in] bushels to the six destinies when cultivating the Water and Land Offering.