首楞嚴義疏注經 6.415

6.415

「我教比丘循方乞食，令其捨貪成菩提道。諸比丘等不自熟食，寄於殘生，旅泊三界，示一往還，去已無返。」

"I teach monks to beg for food in succession to cause them to abandon greed and realize the path to bodhi. The monks do not cook food for themselves; lodging their remaining lives and sojourning in the three realms, they show that they make only a single journey, going without return."