Finally the light rested down upon and overwhelmed him in the midst of it, and his mind at the same time seemed to be caught away from surrounding objects, and he saw nothing excepting the light and two glorious personages standing before him in the midst of this light. One of these personages, pointing to the other, said-"Behold my beloved Son, hear ye him."
Journal of Discourses 17:279 (September 20, 1874). - Joseph Smith Jr.'s First Vision
Journal of Discourses/Volume 17/Joseph Smith's First Visions, etc.