The "Zohar" calls the day of Bar Yochai's death a "hillula". Rabbi Chaim Vital, the main disciple of Rabbi Isaac Luria and author of "", was the first to name Lag BaOmer as the date of Bar Yochai's "hillula". According to the "Zohar" (III, 287b–296b), on the day of Bar Yochai's death, he revealed the deepest secrets of the Kabbalah. Lag BaOmer therefore became a day of celebration of the great light (i.e., wisdom) that Bar Yochai brought into the world.