The hymns attributed to the Âr̤vârs are commonly known by the name of Prabandham or Nâlâyiram and are accepted by the Tengalai Vishnuites as their canonical scriptures. The whole collection contains 4000 verses arranged in four parts[576] and an extract consisting of 602 verses selected for use in daily worship is in part accessible.[577] This poetry shows the same ecstatic devotion and love of nature as the Tiruvaçagam. It contemplates the worship of images and a temple ritual consisting in awakening the god at morning and attending on him during the day. It quotes the Upanishads and Bhagavad-gîtâ, assumes as a metaphysical basis a vedantized form of the Sâṅkhya philosophy, and also accepts the legends of the pastoral Kṛishṇa but without giving much detail. Jains, Buddhists and Śaivas are blamed and the repetition of the name Govinda is enjoined. Though the hymns are not anti-brahmanic they decidedly do not contemplate a life spent in orthodox observances and their reputed authors include several Śûdras, a king and a woman. After the poet-saints came the doctors and theologians. Accounts of them, which seem historical in the main though full of miraculous details, are found in the Tamil biographies[578] illustrating the apostolic succession of teachers. It appears fairly certain that Râmânuja, the fourth in succession, was alive in 1118: the first, known as Nâthamuni, may therefore have lived 100-150 years earlier. None of his works are extant but he is said to have arranged the poems of the Âr̤vârs for recitation in temple services. He went on a pilgrimage to northern India and according to tradition was an adept in Yoga, being one of the last to practise it in the south. Third in succession was his grandson Yamunârcârya (known as Âlavandâr or victor), who spent the first part of his life as a wealthy layman but was converted and resided at Śrîrangam. Here he composed several important works in Sanskrit including one written to establish the orthodoxy of the Pâncarâtra and its ritual.[579] 4