The word azhwar means the one who dives deep into the ocean of the countless attributes of god. Azhwars are considered the twelve supreme devotees of Vishnu, who were instrumental in popularising Vaishnavism. The religious works of these saints in Tamil, songs of love and devotion, are compiled as Nalayira Divya Prabandham containing 4000 verses and the 108 temples revered in their songs are classified as Divya desam. The saints had different origins and belonged to different castes. As per tradition, the first three azhwars, Poigai, Bhutha and Pey were born miraculously. Tirumizhisai was the son of a sage, Thondaradi, Mathurakavi, Peria and Andal were from brahmin community, Kulasekhara from Kshatria community, Namm was from a cultivator family, Tirupana from panar community and Tirumangai from kazhwar community. Divya Suri Saritra by Garuda-Vahana Pandita (11th century AD), Guruparamparaprabavam by Pinbaragiya Perumal Jiyar, Periya tiru mudi adaivu by Anbillai Kandadiappan, Yatindra Pranava Prabavam by Pillai Lokacharya, commentaries on Divya Prabandam, Guru Parampara (lineage of Gurus) texts, temple records and inscriptions give a detailed account of the azhwars and their works. According to these texts, the saints were considered incarnations of some form of Vishnu. Poigai is considered an incarnation of Panchajanya (Krishna's conch), Bhoothath of Kaumodakee (Vishnu's Mace/Club), Pey of Nandaka (Vishnu's sword), Thirumalisai of Sudarshanam (Vishnu's discus), Namm of Vishvaksena (Vishnu's commander), Madhurakavi of Vainatheya (Vishnu's eagle, Garuda), Kulasekhara of Kaustubha (Vishnu's necklace), Periy of Garuda (Vishnu's eagle), Andal of Bhoodevi (Vishnu's wife, Lakshmi, in her form as Bhudevi), Thondaradippodi of Vanamaalai (Vishnu's garland), Thiruppaan of Srivatsa (An auspicious mark on Vishnu's chest) and Thirumangai of Saranga (Rama's bow). The songs of Prabandam are regularly sung in all the Vishnu temples of South India daily and also during festivals.