The heavens were opened, and two personages clothed in light or fire descended and stood before him. As soon as this light surrounded him, and he was enclosed or enveloped in it, his mind was caught away from earthly objects and things, and he saw these two glorious personages, their countenances shining with exceeding great brilliancy. One of them, while pointing to the other, addressed him in this language, "Behold my beloved son, hear ye him."
Journal of Discourses 15:181 (September 22, 1872). - Joseph Smith Jr.'s First Vision
Journal of Discourses/Volume 15/Review of God's Dealings with the Prophet Joseph, etc.