Agniveshyagrihyasutra 2.4.4.1

2.4.4.1

atha kūśmāṇḍairjuhuyād yā 'pūta iva manyeta yathā steno yathā bhrūṇahaivameṣa bhavati yo 'yonau retaḥ siñcati \

Now, one who considers himself as if impure should sacrifice with the Kūṣmāṇḍa verses; just as a thief, just as an embryo-slayer, even so becomes he who sheds semen in an improper receptacle.