Upanayana / Yajnopavita (यज्ञोपवीत, yajñopavīta)

Upanayana (also called the investiture of the yajnopavita or sacred thread) is widely recognized in Hindu contexts as an initiation rite associated with commencement of Vedic study and formal social-religious status. The provided source excerpt addresses nāgas—divine or semi-divine serpent beings in South Asian religious imagination—and notes that rituals devoted to nāgas have existed for at least two millennia. However, that excerpt does not describe the Upanayana ceremony itself, its timing, liturgy, or any protective function attributed to the sacred thread within the source. Therefore this entry confines itself to reporting that the supplied material does not link Upanayana to nāga-protection or provide procedural or material details for Upanayana.