Laṅkāvatāra Sūtra
The "Laṅkāvatāra Sūtra" describes the "tathāgatagarbha" as "by nature brightly shining and pure," and "originally pure," though "enveloped in the garments of the "skandhas", "dhātus" and "ayatanas" and soiled with the dirt of attachment, hatred, delusion and false imagining." It is said to be "naturally pure," but it appears impure as it is stained by adventitious defilements. Thus the "Laṅkāvatāra Sūtra" identifies the luminous mind of the canon with the "tathāgatagarbha".