The Great Epic of the Bhārata dynasty 6.27.27

6.27.27

sparśānkṛtvā bahirbāhyāṃścakṣuścaivāntare bhruvoḥ |
prāṇāpānau samau kṛtvā nāsābhyantaracāriṇau || 27 ||

Excluding (from his mind) all external objects of sense, directing the visual glance between the brows, mingling (into one) the upward and the downward life-breaths and making them pass through the nostrils, the devotee, who has restrained the senses, the mind, and the understanding, being intent on emancipation, and who is freed from desire, fear, and wrath, is emancipated, indeed. Knowing me to be enjoyer of all sacrifices and ascetic austerities, the great Lord of all the worlds, and friend of all creatures, such a one obtaineth tranquillity.'