Skandapurana 7.20.124

7.20.124

devān vijitavatoḥ śuṃbhaniśuṃbhayorvindhyācale āgatya nivasanam . śuṃbhānucarasya mūkadānavasya vindhyaśikhare kauśikīdarśanam . mūkavacasā kāmāturasya śuṃbhasya devīsamīpe dūtapreṣaṇam . devyā svasya yuddhaśulkatvajñāpanam . daityānāmitikartavyatāviṣaye parāmarśaḥ .

The dwelling on Mount Vindhya of Śumbha and Niśumbha after conquering the gods. The sighting of Kauśikī on the peak of the Vindhya by the Dānava Mūka, an attendant of Śumbha. The sending of an envoy to the goddess by Śumbha, who was afflicted with desire upon Mūka's words. The goddess's announcement of herself as one whose bride-price is battle. The deliberation among the Daityas regarding what ought to be done.