Āpūraṇa is one of the Nāgas (Naga; Snake) born of the womb of Kadrū (Kadru), sired by Kaśyapa Prajāpati (Kasyapa Prajapati; Kasyapa, Ruler of the People). In Āstīkaparva (Astikaparva) of Mahābhārata (Mahabharata), while speaking of the names of the snakes, Vaiśampāyana(Vaisampayana) mentioned him. Nārada (Narada), too, while describing to Mātali (Matali) the distinguished Nagas who reside in the Bhogavatī Purī (Bhogavatī Puri, the City of Bhogavati)of Pātala (Patala; the underworld), mentioned the name of Āpuraṇa. According to Viṣṇupurāṇa, Āpūraṇa stays in the chariot of Surya in the month of Bhādra (Bhadra; a month roughly coinciding with late August and early September according to the Western calender).