זוהר שמות — דף סז ע”א

Parashah Beshalah and Yitro. The sixty warriors surrounding the Shekhinah, their light is inscribed in the Naar (Metatron) and are called sixty strikes of fire. When a man opened the Zohar and studied without proper intention, spirits and demons were aroused against him. Protection in Torah study: one who studies with devotion and awe is protected by the Shekhinah. Destructive angels only affect those who lack intention. Introduction to Parashah Yitro: Yitro heard all the miracles and came to join Israel, and through him the Torah was given.