Kurmapurana 2.33.19

Kūrmapurāṇa 2.33.19

aśmāntakaṃ tathā potaṃ taptakṛcchreṇa śuddhyati /
prājāpatyena śuddhiḥ syāt kakkubhāṇḍasya bhakṣaṇe //