זוהר ויקרא — דף ז ע”א

The Zohar poses the question: by what judgment is the spiritual prince of the nations judged? He is made to pass through the river of fire (Nahar Dinur) that flows and emerges before the Holy Blessed One. The Zohar describes the order of the supreme judgment and the spiritual princes of the nations judged in the heavenly court. The secret of the food and influence of the princes over their peoples is thus explained.