天台八教大意 1.6

1.6

次說諸部《般若》，轉教付財，雖通洮汰。約譬次第名熟酥味，故迦葉領解云：「長者自知將死不久」等，即第四味也。

Next, he preached the various sections of Prajñāpāramitā, delegating the teaching and entrusting the wealth, carrying out a thorough cleansing. In terms of the sequence of the metaphor, it is called the flavor of clarified butter. Therefore Kāśyapa expressed his understanding, saying: 'The elder knew himself that he would not live long,' and so forth; this is the fourth flavor.