Markandeyapurana 32.22

32.22

śvā caiva hanti śrāddhāni yātudhānāśca darśanāt /
tasmāt susaṃvṛto dadyāttilaiścāvakiranmahīm //

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.

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.