Nilamatapurana 760

760

tatastvanantaraṃ pakṣe śrāddhaṃ kāryaṃ dine dine
caturdaśīṃ varjayitvā śyāmākaistu viśeṣataḥ

Then, immediately in the next fortnight, an ancestral rite should be performed day by day, / excluding the fourteenth day, especially with wild millets.