Bhagavad Gita Chapter 6.13-14
samaḿ kāya-śiro-grīvaḿ
dhārayann acalaḿ sthiraḥ
samprekṣya nāsikāgraḿ svaḿ
diśaś cānavalokayan
praśāntātmā vigata-bhīr
brahmacāri-vrate sthitaḥ
manaḥ saḿyamya mac-citto
yukta āsīta mat-paraḥ
Translation
One should hold one’s body, neck and head erect in a straight line and stare steadily at the tip of the nose. Thus, with an unagitated, subdued mind, devoid of fear, completely free from sex life, one should meditate upon Me within the heart and make Me the ultimate goal of life.