Vamśānukramaṇikā: Varuṇa–Kali Descendants and the Naiṛta Grahas
Genealogical Catalogue
यमौ प्रासूत च पुनर्यमं च यमुनां च ह / सा तु गत्वा कुरून्देवी वडवा रूपधारिणी
yamau prāsūta ca punaryamaṃ ca yamunāṃ ca ha / sā tu gatvā kurūndevī vaḍavā rūpadhāriṇī
She then bore the twins as well—Yama and Yamunā. After that, the Goddess went to the land of the Kurus, assuming the form of a mare (vaḍavā).