Bhagavad Gita 5.27 Chapter 5, Verse 27

स्पर्शान्कृत्वा बहिर्बाह्यांश्चक्षुश्चैवान्तरे भ्रुवोः ।
प्राणापानौ समौ कृत्वा नासाभ्यन्तरचारिणौ ॥५.२७॥

sparśānkṛtvā bahirbāhyāṃścakṣuścaivāntare bhruvoḥ
prāṇāpānau samau kṛtvā nāsābhyantaracāriṇau

Meaning

Shutting out external contacts, fixing the gaze between the eyebrows, balancing the in-breath and out-breath moving within the nostrils,

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 5.27 (Chapter 5, The Yoga of Renunciation (Karma Sannyasa Yoga), Verse 27)