The Amitāyus Sutra
The Amitāyus Sutra (Sanskrit), simplified Chinese: 佛说无量寿经; traditional Chinese: 佛說無量壽經; pinyin: Fóshuō Wúliàngshòu Jīng; Sutra of Immeasurable Life Spoken by Buddha; Vietnamese: Phật Thuyết Vô Lượng Thọ Kinh; Japanese: Bussetsu Muryōju Kyō (Taisho Tripitaka no. 360), also known as the Longer Sukhāvatīvyūha Sūtra, is one of the two Indian Mahayana sutras which describe the pure land of Amitābha (also known as Amitāyus, "Measureless Life"). Together with the Sukhāvatīvyūha Sūtra, this text is highly influential in East Asian Buddhism. It is one of the three central scriptures of East Asian Pure Land Buddhism, and is widely revered and chanted by Pure Land Buddhists throughout Asia.
The title is often translated in English as either the Sutra [on the Buddha] of Immeasurable Life, or simply the Immeasurable Life Sutra.