佛祖統紀 3.75

3.75

On the classification of the Trapuṣa [sūtra], the author comments: When the Buddha expounded the five precepts as the teaching for humans and devas, this was precisely the manifest [teaching]. Trapuṣa attaining forbearance—hearing the small and realizing the great—was indeed the indeterminate [teaching]. Thus it is the manifest and indeterminate teaching. If considered in terms of time, it falls after the three periods of seven days of the Avataṃsaka and after the seven days by the water; this constitutes the fifth period of seven days, as stated in the Guo qu ying guo jing. If categorized by scripture, the human and deva teachings are subsumed within the Tripiṭaka, as stated in the Sijiao yi.