"Longevity Buddha" is a term for the Buddha of Aparimita-āyur-jñāna-suviniścita-tejo-rāja, also referred to as the "Buddha of Infinite Wisdom and Life" in Tibetan Buddhism. And according to Buddha Proclaiming Mahayana Aparimita-āyur-jñāna-suviniścita-tejo-rāja Sutra, Buddha Proclaiming Arya Limitless Long Life Mahayana Sutra and related texts, the aparimita-āyur-jñāna-suviniścita-tejo-rāja Buddha's pure land is named the Infinite Merits Store World (alternatively translated as the "Infinite Merits and Virtues Gathering World" in Mahayana Infinite Life Compilation Sutra); the supreme merit of the "Infinite Life & Wisdom Tathagata" and his sutras and mantras lies in the ability to prevent untimely death and extend life.
Amitayus (the Longevity Buddha), uṣṇīṣa vijaya (the Venerable and Transcendental Buddha Mother), and White Tara symbolize good fortune, long life, and auspiciousness in Tibetan Buddhist tradition, and are collectively known as the "The Venerable Three for Longevity," a common trio depicted in Tibetan Buddhist temples.
Also, Longevity Buddha typically occupies the central position, flanked by White Tara on the lower left and uṣṇīṣa vijaya on the lower right.
Some sutra states that worshiping, transcribing, offering, and practicing according to Aparimita-āyur-jñāna-suviniścita-tejo-rāja-dhāraṇī can help overcome the disaster of premature death, extend life to a full century, and lead to the wisdom world of the Pure Land of Infinite Merits of the Buddha, and of course, be born in whichever pure Buddha lands they aspire for and delight in and ultimately, they enable practitioners to follow the Buddhist path and swiftly attain enlightenment.
This work is a Thangka painting from the Meythang School, depicting the central deity White Tara, surrounded by the solemn and exquisite decorations of a backlit Heavenly Palace. The painting features Shakyamuni Buddha, Four-Armed Avalokiteśvara, and Padmasambhava, all, above, symbolizing the purity of the Dharma’s lineage. And flanking the central figures are the Longevity Buddha and Uṣṇīṣa Vijayā, representing longevity, the overcoming of obstacles, and the attainment of complete blessings and virutues. The Yellow Deity of Wealth below symbolizes abundant prosperity.
By offering to the Three Masters of Longevity and practicing their teachings, one can extend their lifespan and increase their wealth, virtues and blessings, wisdom, and resources, and avoid untimely and accidental death. This practice is said to eliminate the ten evil deeds, four heavy sins, and five irreversible sins, removing all obstacles and hindrances.
Given the impermanence of the human life, destined to enter and exit this world, devotion to the Buddhas of Longevity can cure illness and prolong life in the present, and at the end of one's life, the Buddha of Longevity will guide them to the realm of immeasurable merits and virtues, offering the opportunity for rebirth in a pure Buddhist land of their choosing.