Vṛṣṇivaṃśa–Anukīrtana (Enumeration of the Vṛṣṇi Lineage) — Questions on Viṣṇu’s Human Descent
पित्तमग्निः स्मृतो ह्येतदग्नीषोमात्मकं जगत् / एवं प्रवर्त्तिते गर्भे वृत्ते कर्कन्धुसंनिभे
pittamagniḥ smṛto hyetadagnīṣomātmakaṃ jagat / evaṃ pravarttite garbhe vṛtte karkandhusaṃnibhe
Pitta is remembered as fire; this world is of the nature of Agni and Soma. Thus the embryo proceeds, becoming round like the karkandhu fruit.