Devi Bhagavatam Purana, The Second Book, Chapter 6, On the birth of the Pānḍavas. Once, on an occasion, Durvasa Muni, engaged in the vow, lasting for four months, came there; Kunti served him during that period; the Muni became greatly pleased and gave her a very auspicious, mantra, by virtue of which any Deva, when called upon by that mantra