זוהר שמות — דף קיב ע”א

The minister of Esav resembles a dog that snatches a pure bird, from whom the catch is taken and given one useless bone. All the judgments of the Holy One are judgments of truth even if humans do not comprehend them. Solomon the king teaches that one who constantly labors in evil will not produce offspring lest he destroy the world. Both Jacob and Samuel drove away the minister of Esav so that he would have no share in holiness.