Chandogabrahmana 7.28

Chandogabrāhmaṇa 7.28

iyaṃ duruktāt paribādhamānā varṇaṃ pavitraṃ punatī na āgāt
prāṇāpānābhyāṃ balamāharantī svasā devī subhagā mekhaleyam