The Pāñcarātra Āgama, which are based on Ekāyana recension of the Śukla Yajurveda, is later than the Vedas but earlier than the Mahabharata. The main āgamas are the Vaiśnava (worship of Vishnu), the Śaiva (worship of Shiva) and the Śākta (worship of Devi or Shakti) āgamas; all āgamas are elaborate systems of Vedic knowledge. According to Vedanta Desika, the Pāñcarātra āgama teaches the five-fold daily religious duty consisting of - abhigamana, upādāna, ijyā, svādhyāya and yoga, the name of this āgama is derived on account of its description of the five-fold manifestation of the Supreme Being viz, para (supreme or the transcendental form), vyūha (formation or manifestation as the four vyūha), vibhava (reincarnation or descent to earth as avtāra), arcā (visible image of God) and antaryāmi (cosmic form of God). Lakshmi accompanies Vishnu in His Chatur-vyūha (four-fold manifestation) as Vāsudeva (creator), Saṅkarṣaṇa (sustainer), Pradyumna (destroyer), and Aniruddha (spiritual knowledge promulgator). This is the Vaiśnava doctrine of Vyūha or the doctrine of formation.