Markandeyapurana 31.21

31.21

viśiṣṭabrāhmaṇaprāptau sūryendugrahaṇe 'yane /
viṣuve ravisaṃkrāntau vyatipāte ca putraka //

“Learn of me the voluntary seasons. On the arrival of a distinguished brāhman, on an eclipse of the sun or moon, at the solstice, at the equinox, at the sun’s passage from one sign into another, and on the occasion of a portent,[4] my son, on acquiring property worthy of a śrāddha, and on seeing a bad dream, and at occultations of the constellation or planet under which one is born, one should perform the śrāddha according to one’s inclination.