仁王護國般若波羅蜜多經 1.67

1.67

「大王！修實相者，如文字修。實相即是諸佛智母，一切有情根本智母，此即名為一切智體。諸佛未成佛，與當佛為智母；諸佛已成佛，即為一切智。未得為性，已得為智。三乘般若，不生不滅，自性常住。一切有情，此為覺性。若菩薩不著文字、不離文字，無文字相非無文字，能如是修不見修相，是即名為修文字者，而能得於般若真性，是為般若波羅蜜多。

"Great King! One who cultivates dharmatā cultivates it just as with written words. Dharmatā is the mother of wisdom of all Buddhas, the mother of fundamental wisdom of all sentient beings; this is called the substance of all-knowledge. When the Buddhas have not yet attained Buddhahood, it serves as the mother of wisdom for the future Buddhas; when the Buddhas have already attained Buddhahood, it is all-knowledge. Unattained, it is nature; already attained, it is wisdom. The prajñā of the three vehicles neither arises nor ceases; its self-nature is eternally abiding. In all sentient beings, this is the nature of awakening. If a bodhisattva does not cling to written words nor depart from written words, has no characteristics of written words yet is not without written words, and can cultivate in this way without seeing the characteristics of cultivation, this is called one who cultivates written words, and they are able to attain the true nature of prajñā. This is Prajñāpāramitā.