Skandapurana 1.3.6.99

1.3.6.99

tathā brahmāṃśasaṃbhūto jāmbavānnṛkṣakuñjaraḥ..
śilādatanayo naṃdī śivasyānucaraḥ priyaḥ.. 8.99 ..

Likewise, Jāmbavat, the best of bears, was born from a portion of Brahmā.
Nandin, the son of Śilāda, is the beloved attendant of Śiva;