śrāddhabhug vṛṣalītalpaṃ tad ahar yo 'dhigacchati / tasyāḥ purīṣe taṃ māsaṃ pitaras tasya śerate //
If the partaker of a Sraddha (-dinner) enters on the same day the bed of a Sudra female, the manes of his (ancestors) will lie during that month in her ordure.