Agnipurana 78.2

78.2

āṣāḍhādicaturdaśyāmatha śrāvaṇabhādrayoḥ /
sitāsitāsu kartavyaṃ caturdaśyaṣṭamīṣu tat //

On the fourteenth day of the lunar months beginning with Āṣāḍha, and then in Śrāvaṇa and Bhādrapada,
on the fourteenth and eighth lunar days during the bright and dark fortnights, it should be performed;