"The bhakti movement began in South India about the sixth century AD when several saints wandered from temple to temple singing the praise of Vishnu or Shiva. The twelve devotees of Vishnu who are recognized as poet-saints by the Srlvaisnava community were called the alvars and the sixty-three devotees of Siva were known as nayanmars. Tirumankai alvar and NammaWar wrote over half of the four thousand verses [in Tamil language] that forms the Divya Prabandham or Sacred Collect for the Srlvaisnava community."
January 1, 1970
https://en.wikiquote.org/wiki/Tamil_language