金剛經纂要刊定記 2.51

2.51

即十二年後，說諸部般若之教詮顯妙慧。妙慧即第六般若波羅蜜。以法身是真如妙理本不生滅，但以煩惱覆之，名如來藏。若妙慧照破煩惱，真理顯現成大法身，故說妙慧為法身因也。

Namely, after twelve years, the teachings of the various sections of prajñā were expounded to express and reveal wondrous wisdom. Wondrous wisdom is the sixth, prajñāpāramitā. Because the dharmakāya is the wondrous principle of tathatā, originally unarisen and unceasing, yet covered by afflictions, it is called the tathāgatagarbha. If wondrous wisdom illuminates and shatters afflictions, the true principle becomes manifest and constitutes the great dharmakāya; therefore, wondrous wisdom is said to be the cause of the dharmakāya.