Prajāpati-vaṃśānukīrtana — Genealogical Enumeration of Progenitors
Dharma’s Line and the Sādhyas
इत्येते द्वादशादित्याः कश्यपस्य सुता विभोः / सुरभ्यां कश्यपाद्रुद्रा एकादश विजज्ञिरे
ityete dvādaśādityāḥ kaśyapasya sutā vibhoḥ / surabhyāṃ kaśyapādrudrā ekādaśa vijajñire
Thus these twelve Ādityas are the sons of the mighty Kaśyapa. And from Surabhī, by Kaśyapa, eleven Rudras were born.