Tirumantiram
The Tirumantiram (Tamil: திருமந்திரம்) or Thirumantiram is a Tamil poetic work, written either in the 2nd century BCE and 4th century CE by Tirumular. It is the tenth of the twelve volumes of the Tirumurai, the key texts of Shaiva Siddhanta and the first known Tamil work to use the term.