Apastambasmriti 9.29

9.29

punarbhūḥ punaretā ca retodhā kāmacāriṇī
āsāṃ prathamagarbheṣu bhuktvā cāndrāyaṇaṃ caret

Having eaten at the first pregnancies of these—a remarried woman, one who returns again, / one bearing another's seed, and an unchaste woman—he should perform a cāndrāyaṇa penance.