This comes from the Kriyātantra section, Action tantras, of the Kangyur. It is also found in the Compendium of Dharanis (Toh 1092).
In Praise of the Glorious Goddess Sarasvatī presents a series of lyrical verses in praise of the deity Sarasvatī, the patron goddess of spoken and written eloquence. With evocative imagery and inspiring language, the praise pays tribute to Sarasvatī’s unimpeded speech, memory, and knowledge, and to her physical majesty and compassionate nature. The praise includes petitions requesting Sarasvatī to grant the devotee a level of eloquence and learning equal to that of the goddess herself. In the tradition of the Great Vehicle, the praise aligns the attainments of eloquent speech, strong memory, and great learning with the intention to use them for the benefit of other beings.
I posted this to the general TB section but perhaps it should be moved to Tantra Talk as an announcement. There doesn't seem to be an exact place for this (definitely not the Mahayana Sutra forum).Among the praises to Sarasvatī preserved in Buddhist literature, In Praise of the Glorious Goddess Sarasvatī is unique for being classified by the compilers of the Tibetan canon as the word of the Buddha (buddhavacana) and thus included in the Kangyur, rather than as the work of human authors such as are compiled in the Tengyur. The other praises to Sarasvatī in the Tibetan canon are all preserved in the Tengyur, and include Śrīdhara’s Vajrasarasvatīstotra (Toh 1925) and the Sarasvatīstotra attributed to Kālidāsa (Toh 3704). Sarasvatī is also the subject of a substantial collection of Indic practice manuals (sādhana), which are preserved in the Tengyur as well. In the Tibetan tradition, Sarasvatī holds a position of importance as a patron goddess of both spoken and written eloquence, as is exemplified in Tsongkhapa Losang Drakpa’s (1357–1419) celebrated Verses in Praise of the Goddess Sarasvatī (sgra dbyangs lha mo dbyangs can ma la bstod pa’i tshigs su bcad pa). Despite Sarasvatī’s popularity in Tibet, In Praise of the Glorious Goddess Sarasvatī does not appear to have been widely studied or quoted in Tibetan literature.