Ossain

Ossaim (in the scientific Yoruba orthography Ọ̀sanyìn, revered under titles such as Agbenigi and Ewé L'orixá) is the primordial orisha of sacred leaves, of botanical medicine, of the therapeutic mysteries of the forests and of liturgical incantations (ọfọ̀) in the traditional Yoruba religion and in the Afro-Brazilian and Caribbean traditions. In the metaphysics of candomblé and of classical Yoruba thought, the fundamental axiom 'Kò sí ewé, kò sí òrìṣà' ('Without leaves there is no orisha') holds sway, for it is in the virgin leaves that the purest concentration of axé (àṣẹ) dwells, indispensable for the consecration of sacred settings, purifying lustral baths (agbó), initiations and bodily remedies. Conceived as a mysterious being who inhabits the depths of the wild forest — described in the oral narratives sometimes as a solitary elder with a single leg, sometimes accompanied by the guardian spirit Aroni — Ossaim is the supreme physician of the pantheon. In the famous myth preserved in the Odu Ọ̀sá Méjì, the other orishas tried to seize the leaves scattered by the winds of Iansã, but discovered that the plants remain inert and devoid of healing efficacy without the sacred chants of sassanyin, of which only Ossaim holds the ritual key.

6 min read · Reviewed on September 29, 2026 · How we research

The staff with a bird, the sacred leaves, the single leg and the pipe

Primary sources

• Pierre Fatumbi Verger, Ewé: Le verbe et le pouvoir des plantes chez les Yorouba. translation: Bilingual edition with ethnobotanical catalogue, Paris: Maisonneuve et Larose, 1995.
• Wande Abimbola, Sixteen Great Poems of Ifá. translation: UNESCO / Niamey, 1975 (commentary on the Odu Ọ̀sá Méjì).
• Ulli Beier, Yoruba Poetry: An Anthology of Traditional Poems. translation: Cambridge: Cambridge University Press, 1970.

Studies

• Anthony D. Buckley, Yoruba Medicine. Clarendon Press / Oxford University Press, Oxford, 1985.
• Marco Aurélio Luz, Agadá: Dinâmica da Civilização Africano-Brasileira. Editora da Universidade Federal da Bahia, Salvador, 2000.
• Babatunde Lawal, The Gèlèdé Spectacle: Art, Gender, and Social Harmony in an African Culture. University of Washington Press, Seattle, 1996.