Skandapurana 1.3.25.62

1.3.25.62

vamanaṃ vai bhavadbhiśca kāryamadyaiva bhoḥsurāḥ..
tatheti matvā te sarva iṃdrādyā devatāgaṇāḥ..
vemuḥ sarve tadā viprāstadretaḥ śaṃkarasya ca.. 27.62 ..

Vomiting must be done by you this very day, O gods!” / Thinking “So be it,” all those hosts of gods, Indra and the rest, / then vomited that semen of Śaṃkara, O brahmins.