The Black Prism - Pg 410

   Corvan's lips moved faintly, mouthing words. Oh, he was praying, she realized. Finished, he made the triangle, splaying three fingers: touching his thumb to his right eye; his middle finger to his left eye; and his forefinger to his forehead, the spiritual eye. He completed the gesture by touching mouth, heart, and hands. The three and the four, the perfect seven, sealed to Orholam. What you behold, what you believe, how you behave.