This verse is from the Bhagavad Gita, Chapter 6, Verse 13. It is written in Sanskrit and translates to English as follows:
samaṁ kāya-śhiro-grīvaṁ dhārayann achalaṁ sthiraḥ
samprekṣhya nāsikāgraṁ svaṁ diśhaśh chānavalokayan || 13 ||
"Keeping the body, head, and neck straight and steady, motionless, gazing at the tip of one's nose, without allowing the eyes to wander."
Samaṁ: Straight
Kāyaśirogṛivaṁ: Body, head, and neck
Dharayan: Keeping
Achalaṁ: Motionless
Sthiraḥ: Steady
Samprekṣya: Gazing
Nasikagraṁ: The tip of the nose
Svaṁ: Own
Dishaḥ: Directions
Cha: and
Anavalokayān: Not looking around