One verse

Bhagavad Gita 5.27

5.27

स्पर्शान्कृत्वा बहिर्बाह्यांश्चक्षुश्चैवान्तरे भ्रुवोः | प्राणापानौ समौ कृत्वा नासाभ्यन्तरचारिणौ ||५-२७||

sparśānkṛtvā bahirbāhyāṃścakṣuścaivāntare bhruvoḥ . prāṇāpānau samau kṛtvā nāsābhyantaracāriṇau ||5-27||

sparśān
sense objects, such as sound
kṛtvā
keeping
bahiḥ
external
bāhyān
unnecessary
cakṣuḥ
eyes
ca
also
eva
certainly
antare
between
bhruvoḥ
the eyebrows
prāṇa-apānau
up- and down-moving air
samau
in suspension
kṛtvā
keeping
nāsa-abhyantara
within the nostrils
cāriṇau
blowing

Shutting out all external sense objects, keeping the eyes and vision concentrated between the two eyebrows, suspending the inward and outward breaths within the nostrils, and thus controlling the mind, senses and intelligence, the transcendentalist aiming at liberation becomes free from desire, fear and anger. One who is always in this state is certainly liberated.