Naga ordination refers to the traditional ceremonies and procession that precede the formal monastic ordination of novice (pabbajjā) or fully ordained (upasampadā) monks in Theravāda Buddhist communities of Thailand, Laos, and Cambodia. The term derives from a legend in which a nāga (serpent-being) attempted to ordain as a monk; although the Buddha ruled that only humans may receive ordination, he permitted the term nāga to be applied to ordination candidates as an honorary title.