Vijnana Bhairava Tantra · Dharana 13 · Verse 36
Brow light, then seal the gates
Gently close the seven openings of the head with the fingers—the eyes, the ears, the nostrils, and the mouth—and rest attention at the point between the eyebrows. A point of light may appear. If it does, stay with it as it slowly fades. Keep the seal brief, release it at once if you need air, and never hold the breath to the point of strain. The practice is the fading, not the light show.
Older line
Closing the gates of the senses with the hands, and piercing the point between the eyebrows, one sees a point of light. As it gradually dissolves, one rests in the supreme state, at its very center.