His two nostrils are the generating centers of our breathing and of all other airs, His smelling powers generate the Aśvinī-kumāra demigods and all kinds of medicinal herbs, and His breathing energies produce different kinds of fragrance.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
सर्वासूनां च वायोश्च तन्नासे परमायने । अश्विनोरोषधीनां च घ्राणो मोदप्रमोदयोः
sarvāsūnāṃ ca vāyośca tannāse paramāyane | aśvinoroṣadhīnāṃ ca ghrāṇo modapramodayoḥ
SB 2.6.2