Mahabharata 3.181.11
निर्मलानि शरीराणि विशुद्धानि शरीरिणाम्ससर्ज धर्मतन्त्राणि पूर्वोत्पन्नः प्रजापतिः
nirmalāni śarīrāṇi viśuddhāni śarīriṇāmsasarja dharmatantrāṇi pūrvotpannaḥ prajāpatiḥ
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book