BG 5.25-27
Rishis, their sins destroyed, their duality removed, their selves controlled, intent upon the welfare of all beings, obtain the Peace of the Eternal. The Peace of the Eternal lies near to those who know themselves, who are disjoined from desire and passion, subdued in nature, of subdued thoughts. Having external contacts excluded, and with gaze fixed between the eyebrows; having made equal the outgoing and ingoing breaths moving within the nostrils;