Mudgalapurana 6.7.47

6.7.47

varāho jñānarūpaśca sadā niḥsaṅgabhāvataḥ |
karmajātiṣu tiṣṭhettu sa eva ravivācakaḥ ||

And the Boar has the nature of knowledge, ever through his unattached state; / though he stands among the classes of actions, he indeed designates the sun.