Markandeyapurana 32.20

32.20

aniṣṭaduṣṭaśabdogradurgandhā cātra karmaṇi /
kulāpamānakāḥ śrāddhe vyāyujya kulahiṃsakāḥ //

And in this ceremony ground must he avoided that is swarming with insects, that is rough, and that has been scorched by fire, and that is hot with the words of enemies and wicked men, and that is foul-smelling.

Men who disgrace their family or who injure their family by separating themselves from the śrāddha, naked men and criminals may destroy the ceremony to the pitṛs with their glance; a eunuch, and a man repudiated by his relations, a cock, and the village hog, and a dog, each ruins śrāddhas by his look, and so also do Rākṣasas.