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Ratnagotravibhāga
The Ratnagotravibhāga (Sanskrit, abbreviated as RgV) and its vyākhyā commentary (abbreviated RgVV), also known as the Uttaratantraśāstra, are a compendium of the tathāgatagarbha literature. The text was originally composed in Sanskrit. The text and its commentary are also preserved in Tibetan and Chinese translations.
The Ratnagotravibhāga describes the gotra or "lineage" of the buddhas, which is the buddha-nature present in all beings. It is a Yogacara text particularly popular in East Asian Yogacara.