Skandapurana 5.130.42

5.130.42

mārgaśīrṣe'tha saṃprāpte tṛtīyādivase site ..
tāṃ devīṃ pūjayāmāsa varṣaṃ yāvakṛtakṣaṇā .. 42 ..

Then, when Mārgaśīrṣa arrived, on the third day of the bright fortnight, / she worshiped that goddess for a year, having found her opportunity.