Matsyapurana 60.16

60.16

tayā sahaiva deveśaṃ tṛtīyāyām athārcayet
phalairnānāvidhairdhūpair dīpanaivedyasaṃyutaiḥ //

The Lord Fish said:—The devotee should bathe himself with sesamum in the forenoon, on the third day of the lunar fortnight, in the month of Chaitra, during the vernal season; for, on that day, the Goddess was united to Śiva, the soul of the Universe, with marital rites. On that day, Śiva, along with His consort, Pârvatî, should be worshipped with flowers, fruits, incense, lamps, and offerings of foods, &c ; and the image (of Gaurî) should be bathed with Pañchagavya and scented waters, after which Gaurî and Śaṅkara should be worshipped as follows :—14-17.