The Rigveda or Rig Veda is an ancient Indian collection of Vedic Sanskrit hymns. It is one of the four sacred canonical Hindu texts known as the Vedas. Only one Shakha of the many survive today, namely the Ĺšakalya Shakha. From Wikipedia
The 25-year-old Rig Vedic scholar from Andhra Pradesh ascends to spiritual leadership during Akshaya Tritiya ceremonies, continuing an unbroken lineage since 482 BCE.