Skandapurana 5.83.18

5.83.18

tato divyavapurbhūtvāvimānavaramāśritaḥ ..
jagāma śivalokaṃ sa durlabhaṃ dhārmikairapi .. 18 ..

Then, having assumed a divine body, mounted upon an excellent aerial chariot,
he went to the world of Śiva, which is difficult to attain even by the righteous.