अग्निनिचयः (Agninichaya) / The Accumulation of Sacred Fire & the Classification of Pitṛs by Time-Order
अनुवाता च लोकस्य स वायुरनुवत्सरः / अहङ्कारादुदग्रुद्रः संभूतो ब्रह्मणास्तु यः
anuvātā ca lokasya sa vāyuranuvatsaraḥ / ahaṅkārādudagrudraḥ saṃbhūto brahmaṇāstu yaḥ
The following breeze of the world is he; that Vayu is called Anuvatsara. And he is the fierce Rudra, born from Brahma out of ahamkara, the sense of “I”.