The Śrīmālādevī Siṃhanāda Sūtra (traditional Chinese: 勝鬘師子吼一乘大方便方廣經, of Queen Śrīmālā) is one of the main early Mahāyāna Buddhist texts belonging to the Tathāgatagarbha sūtras that teaches the doctrines of Buddha-nature and "One Vehicle" through the words of the Indian queen Śrīmālā. After its composition, this text became the primary scriptural advocate in India for the universal potentiality of Buddhahood.