無量壽經連義述文贊 2.97

2.97

經曰「設我得佛」至「不取正覺」者，述云：此後七願，願得心樂。有六：此初、願得宿命樂也。

On the passage from the sūtra beginning "If, when I attain Buddhahood" down to "may I not attain perfect enlightenment": The commentary says: The subsequent seven vows are vows to attain mental joy. There are six [parts]: here the first is the vow to attain the joy of recollecting past lives (pūrvenivāsānusmṛti).