That person who having eaten at a Shraddha does not abstain that day from Vedic studies, or who has known that day a Shudra woman, must know that his departed Manes on account of such deeds of his, have to lie for a month on his own excreta.
श्राद्धं भुक्त्वा त्वधीयीत वृषलीतल्पगश्च यः॥ पुरीषे तस्य ते मासं पितरस्तस्य शेरते। सोमविक्रयिणे विष्ठा भिषजे पूयशोणितम्॥