Devibhagavatapurana 10.13.60

10.13.60

vicāraṃ cakrire tatra vadhārthaṃ te suradruhām |
etasminsamaye tatra daityasenāsamāvṛtaḥ ||

There they all held a conference how to kill the Daitya, the enemy of the Gods. While, on the other hand, Aruna, the king of the Daityas surrounded by his army, went ere long to the Heavens.
O Muni! The Daitya, then, through the power of his Tapas, assumed various forms and seized the rights and possessions of the Moon, the Sun, Yama, Agni and all the othars. All the Devas, then, dislodged from their stations went to the region of Kailas'a and represented to S’ankara about their own troubles and dangers respectively. Then, what was to be done on this subject, on this, great discussions cropped up. When Brahmâ said, that the death of the Daitya would not ensue from any fight, with any arms or weapons, from any man or woman, biped, quadruped or from any combination of the above two. Then the Devas became all anxious and could not find out any solution at that instant, when the Incorporeal Voice was clearly heard in the Heavens:-- Let you all worship the Queen of the Universe. She will carry out your work to success. If the king of the Daityas, always engaged in muttering the Gâyatrî, forsakes the Gâyatrî any how, then his death will occur. Hearing this gladdening Celestial Voice, the Devas held the council with great caution. When it was settled what ought to be done, Indra asked Brihaspati and said:-- “O Guru Deva! You would better go to the Daitya for the carrying out of the Devas' ends and do so that he forsakes the Devî Gâyatrî Parames’varî. We will all now go and meditate on Her. When She will be pleased, She will help us.