佛祖統紀 34.37

34.37

二十四年第四般若時。轉教付財融通淘汰。此不說藏教。帶通別二正說圓教。說摩訶般若諸般若經。約時則禺中。約味則從生酥出熟酥（般若二十二年）。

The twenty-fourth year: the fourth, the Prajñā period. Transmitting the teaching and entrusting the wealth, harmonizing and sifting. Here the Tripiṭaka teaching was not preached; carrying along the two, shared and distinct, it correctly preached the perfect teaching. He preached the Mahāprajñāpāramitā and various Prajñā sūtras. In terms of time, it corresponds to mid-morning. In terms of flavor, it corresponds to drawing clarified butter from fresh butter (twenty-two years of Prajñā).