Srimad Bhagvata Mahapurana: Book 9: Chapter 14: Verses 44-49
A brief survey of the Lunar Dynasty
Going to the spot where he had left the vessel, and perceiving (there) a peepul tree sprouting from inside a Sami tree,he hewed out of it a pair of Aran'rs (churning sticks) for kindling fire by attrition. (Then) visualizing the lower Arani to be
son, he, and the upper one as his own self and the piece that intervened the two as their the churned them with a longing to reach the realm of Urvasi uttering sacred texts (detailing a result of his churning was procedure of producing fire through-such churning).  As a result of his churning was produced a flame of fire, which is known by the name of Jatavada (that which has everything created inn this universe by way of its property or food). Through the ceremony of consecration (as enjoined by the tree Vedas) it was adopted by the king (Pururava) in three forms (viz.,the Ahavaniya, the Garhapatya and the Daksinagni) as his son (because leading to scared regions above). Seeking after the realm of Urvasi, Pururava worshipped by means of that fire Lord Sri hari, the Ruler of sacrifices (the Bestower of their fruit), who is above sense-perception and represents all the gods in His person. Of yore (before the time of Pururava) there was but one Veda in the form of Pranava (the mystical syllable OM), the seed of all speech; there was one deity, nrayana, and no other; there was obut one fire (and not three) and onlyl one caste known as the Hamasas. the three Vedas (the cult of rituals expounded by them) came into being from pururava alone ay h dawn of the Treta age, O protector of men, and the king attained (after death) to the realm of the Gandharavas by means of the sacred fire, adopted by him as his son. (49)
Thus ends the fourteenth discourse bearing (inter alia) on the story of Pururava (the son of lla), in Book Nine of the great and glourious Bhagavata-Purana, otherwise known as the Pramahamsa-samhita.