BG 8.8-10
With the mind not wandering after aught else, harmonised by continual practice, constantly meditating, O Pârtha, one goeth to the Spirit supreme, divine. He who thinketh upon the Ancient, the Omniscient, the All-Ruler, minuter than the minute, the supporter of all, of form unimaginable, refulgent as the sun beyond the darkness, In the time of forthgoing, with unshaken mind, fixed in devotion, by the power of yoga drawing together his life-breath in the centre of the two eyebrows, he goeth to this Spirit, supreme, divine.