There the great sage concentrated his mind by the yogic breathing exercises, and thereby controlling all attachment, he remained standing on one leg only, eating nothing but air, and stood there on one leg for one hundred years.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
प्राणायामेन संयम्य मनो वर्षशतं मुनिः । अतिष्ठदेकपादेन निर्द्वन्द्वोऽनिलभोजनः
prāṇāyāmena saṃyamya mano varṣaśataṃ muniḥ | atiṣṭhadekapādena nirdvandvo'nilabhojanaḥ
SB 4.1.19