Manusmriti

siva.sh/manusmriti/3/250

श्राद्धभुग् वृषलीतल्पं तदहर्योऽधिगच्छति । तस्याः पुरीषे तं मासं पितरस्तस्य शेरते ॥ २५० ॥

sanskrit

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.

english translation

zrAddhabhug vRSalItalpaM tadaharyo'dhigacchati | tasyAH purISe taM mAsaM pitarastasya zerate || 250 ||

hk transliteration by Sanscript