Bhagavad Gita Verse 5.27

बाहरके विषय-भोगोंको न चिन्तन करता हुआ बाहर ही निकालकर और नेत्रोंकी दृष्टिको भृकुटीके बीचमें स्थित करके तथा नासिकामें विचरनेवाले प्राण और अपानवायुको सम करके, जिसकी इन्द्रियाँ, मन और बुद्धि जीती हुई हैं, ऐसा जो मोक्षपरायण मुनि इच्छा, भय और क्रोधसे रहित हो गया है,वह सदा मुक्त ही है|

A person who has totally detached himself from sense objects that give temporary pleasure and enjoyment, he who has learned to control and equalize the number of breaths going outwards and inwards through the nostrils, he who has brought his senses, mind and intellect under full control, and he who is desire less fearless and without anger, is always a free and liberated wise man.