apare niyatāhārāḥ prāṇān prāṇeṣhu juhvati
sarve ’pyete yajña-vido yajña-kṣhapita-kalmaṣhāḥ||30||

Meaning : Some others control their food intake and offer their life energies through breath control. All of these people, who understand the meaning of sacrifice, are purified of their sins through these sacred practices.