Mahāprajñāpāramitā Sūtra

...up to the purity of the eightfold noble path. The purity of the eightfold noble path is the purity of that which is produced by the mind. Why? Because the purity of that which is produced by the mind and the purity of the four right efforts up to the eightfold noble path are non-dual, without two divisions, undifferentiated, and unbroken.

Subhuti, the purity of that which is produced by the mind is the purity of the gate of emptiness original: śūnyatā-vimokṣamukha. The purity of the gate of emptiness is the purity of that which is produced by the mind. Why? Because the purity of that which is produced by the mind and the purity of the gate of emptiness are non-dual, without two divisions, undifferentiated, and unbroken.

The purity of that which is produced by the mind is the purity of the gates of signlessness and wishlessness original: ānimitta-apraṇihita-vimokṣamukha. The purity of the gates of signlessness and wishlessness is the purity of that which is produced by the mind. Why? Because the purity of that which is produced by the mind and the purity of the gates of signlessness and wishlessness are non-dual, without two divisions, undifferentiated, and unbroken.

Subhuti, the purity of that which is produced by the mind is the purity of the ten stages of the Bodhisattva. The purity of the ten stages of the Bodhisattva is the purity of that which is produced by the mind. Why? Because the purity of that which is produced by the mind and the purity of the ten stages of the Bodhisattva are non-dual, without two divisions, undifferentiated, and unbroken.

Subhuti, the purity of that which is produced by the mind is the purity of the five...