大方便佛報恩經 6.10

6.10

"What are called the Triratna: Buddha, Dharma, and the Saṅgha of monks? If the Triratna is without intrinsic nature, how are the distinct names of Dharma and Saṅgha explained? For those who take refuge in the Triratna, how do they practice and uphold it? If the three refuges are one, one should not speak of 'three.' If one speaks of 'three refuges,' how are the names of the seven assemblies explained?" At that time, Upāli said to the Buddha: "Bhagavat! Taking refuge in what is called taking refuge in the Buddha?"