Bereshit A: Chapter 48

"And Hashem set a mark upon Cain"


God inscribed the Hebrew Letter Vav ו onto the forehead of Cain. The letter Vav connects to the Sfirot of Yesod, which signifies the Covenant between God and the Israelites. When Cain sincerely repented for the murder of his brother Abel, the letter Vav protected him from the murderous hands of people which were aroused against him by the spiritual law of cause and effect. Provided we fully repent, meditating upon the letter Vav offers us protection from any decrees of judgment.