तथैव स्वशरीरस्थं चालयेत्पवनं धिया । यदा श्रमो भवेद्देहे तदा सूर्येण पूरयेत् ॥ २.६३ ॥

tathaiva svaśarīrasthaṃ cālayetpavanaṃ dhiyā । yadā śramo bhaveddehe tadā sūryeṇa pūrayet ॥ 2.63 ॥

Clever work with Vayu in the body functions the same way - when fatigue is experienced, one begins inhaling through the right nostril.