The Flower Sermon

Among adherents of Zen, the origin of Zen Buddhism is ascribed to a story, known in English as the Flower Sermon, in which Śākyamuni Buddha (Siddhartha Gautama) transmits direct prajñā (wisdom) to the disciple Mahākāśyapa. In the original Sino-Japanese, the story is called nengemishō (literally "pick up flower, subtle smile"). In the story, Śākyamuni gives a wordless sermon to his disciples (sangha) by holding up a white flower. No one in the audience understands the Flower Sermon except Mahākāśyapa, who smiles. Within Zen, the Flower Sermon communicates the ineffable nature of tathātā (suchness) and Mahākāśyapa's smile signifies the direct transmission of wisdom without words. Śākyamuni affirmed this by saying: I possess the true Dharma eye, the marvelous mind of Nirvana, the true form of the formless, the subtle [D]harma [G]ate that does not rest on words or letters but is a special transmission outside of the scriptures. This I entrust to Mahākāśyapa.-Wikipedia