Vṛṣṇivaṃśa–Anukīrtana (Enumeration of the Vṛṣṇi Lineage) — Questions on Viṣṇu’s Human Descent
चातुर्विद्यस्य यो वेत्ता चातुराशम्यसंश्रयः / दिगन्तरं नभो भूमिरापो वायुर्विभावसुः
cāturvidyasya yo vettā cāturāśamyasaṃśrayaḥ / digantaraṃ nabho bhūmirāpo vāyurvibhāvasuḥ
He is the knower of the fourfold sacred learning and the refuge of the four āśramas; he is the expanse of the quarters, the sky, the earth, the waters, the wind, and Vibhāvasu—the radiant fire.