Shiva Purana
बाह्येन मरुता देहं दृतिवत्परिपूरयेत् ॥ नासापुटेनापरेण पूरणात्पूरकं मतम् ॥ २३ ॥
Then through the other nostril the external air is inhaled and the body is filled up like the bellows. It is Pūraka (Inhaling).
english translation
bAhyena marutA dehaM dRtivatparipUrayet ॥ nAsApuTenApareNa pUraNAtpUrakaM matam ॥ 23 ॥
hk transliteration by Sanscript