זוהר שמות — דף סה ע”ב

Parashah Beshalah. There is a grievous evil - one who settles in a good inheritance from their father yet acts against him with false accusations is afflicted with this grievous evil. This is one who received a good portion in this world without recognizing Divine goodness. Israel received its good portion in the world without recognizing the good the Holy One bestowed upon them. Amalek is the great enemy who came to battle Israel after all others feared to. Victory over Amalek is symbolized by you shall utterly destroy, the elimination of all evil from the world.