6:13  

समं कायशिरोग्रीवं धारयन्नचलं स्थिरः ।
सम्प्रेक्ष्य नासिकाग्रं स्वं दिशश्चानवलोकयन् ॥६- १३॥

Transliteration

samaM kaayashirogriiwaM dhaarayannachalaM sthiraH ।

samprekShya naasikaagraM swaM dishashchaanawalokayan ॥६- १३॥

Translation

Aligning the body, head and neck, holding unmoving, steady,

Looking at your own nose-tip, not looking around

Translation

Hold the waist, spine, chest, neck, and head erect, motionless and steady, fix the eyes and the mind steadily between the eye brows, and do not look around. (See also 4.29, 5.27 and 8.10)