Markandeyapurana 32.23

32.23

evaṃ rakṣā bhavecchrāddhe kṛtā tātobhayorapi /
śāvasūtakasaṃspṛṣṭaṃ dīrgharogibhireva ca //

Hence let a man offer the ceremony being well secluded, and scattering the ground with sesamum seed. Thus may safety be secured in the śrāddha even for both, my child.

What has been touched by a corpse or by a recently-delivered woman,[30] and by those who have been long ill, by outcastes, and by filthy persons, does not nourish the pitṛs.