Vaivasvata-Manuputra Vamsha and the Marutta–Samvarta Episode
Genealogical Catalogue
तस्मादुत्तरतायावत्प्रथमं स्वायमं विदुः / तमोदुत्तरमैद्रोयदेवतास्याद्रुवेन च
tasmāduttaratāyāvatprathamaṃ svāyamaṃ viduḥ / tamoduttaramaidroyadevatāsyādruvena ca
Therefore, the first stage toward the north is known as “Svāyama”. What lies to the north of tamas is called “Aidra”, whose presiding deity is said to be joined with Dhruva.