Explanation:

 Nayanars (saints devoted to Shiva) and Alvars (saints devoted to Vishnu) who came from all castes including those considered untouchables Nayanars and Alvars were sharply critical of the Buddhists and Jaina because they were belong to shivasim and vaishavism. Alvar Saints The twelve Alvars were Tamil poet-saints, who lived between 6th and 9th centuries AD and espoused ‘emotional devotion’ or bhakti to Visnu-Krishna in their songs. The devotional songs of the Alvars were created during the Early medieval period of Tamil history and they helped can be called the pioneers of the Bhakti Movement in India. The collection of their hymns is known as Divya Prabandha. All the saints were male except one named Andal. Nayanar Saints The 63 Nayanars saints were the Shiva devotional poets, who lived between 5th and 10th centuries. One saint “Appar” is said to have converted Pallava King Mahendravarman to Saivism. The compilation of their poetry / literature Tirumurai is also called “Tamil Veda”.  These 63 Nayanar saints, along with the 12 Alvars are known as South India’s 75.