Sumati was the Buddha’s name in a previous life when he first generated the intention to reach awakening and was prophesied to become the Buddha Śākyamuni. For his story see The Prophecy of Dīpaṃkara (Dīpaṃkara­vyākaraṇa, Toh 188).

Previous incarnation of Buddha Śākyamuni, whose offering of five blue lotuses to Buddha Dīpaṃkara became a direct cause for his unexcelled, total, and complete enlightenment.

Not to be confused with the Buddha Sumati.