In Anuśāsanaparva (Anusasanaparva) of Mahābhārata (Mahabharata), it is said that Ūrdhvavāhu (Urdhvavahu) is one of the sages who have their place on the right side of Yama.

Mahābhārata (Kinjawadekar)(13.150.34)
Mahābhārata Vols. 1-43 (Siddhāntabāgīśa)(13.128.33)