Atri Smriti 5.35

5.35

sūtake mṛtake caiva mṛtānte ca prasūtake
tasmāttu śaṅgatāśauce mṛtāśauce na śudhyati

In birth impurity and in death impurity, and when birth occurs at the end of a death impurity; / therefore, during an impurity contracted through contact, one is not purified during death impurity.