The Lord said to him, “Therefore whosoever shall kill Cain seven times shall take vengeance.” Another version states, “Not so, but whosoever kills Cain shall receive vengeance in the seventh.” Similarly, it is noted, “Not so; whosoever kills Cain shall finish the seven vengeances.” After the slaying of his brother, when God inquired, “Where is Abel your brother?” Cain defiantly proclaimed, “I do not know; am I my brother’s keeper?” Condemned for this audacity to exist on the earth in constant dread, Cain did not seek forgiveness. Instead, he attached sin to sin, convinced that his guilt was beyond God's pardon. Ultimately, he replied to God, “My guilt is greater than I can bear. If you cast me out from Your presence, I will hide and tremble on the earth, and whoever finds me will kill me.” Cain declared that he was being pursued, and his awareness of his transgression left him unable to endure the light. He felt certain that death awaited him due to his deservingness of it. Yet, God, not wishing for Cain to end his suffering through death, nor to submit him to the punishment he had imposed upon himself, responded firmly: “Not so. You shall not perish; rather, you will endure until the seventh generation and bear the burden of your conscience. Those who kill you will end your suffering.” It implies not that the killer would face sevenfold vengeance but that ending Cain’s life would bring closure to the seven torments inflicted upon him as a consequence of his sins.
To clarify this teaching, let us consider an analogy from daily life. Suppose a servant, after causing his master considerable loss, requests to be put to death as a form of punishment. The master may reply, “You shall not die as you desire, nor escape your suffering through death; rather, you will endure in misery for a long time, and whoever kills you will actually do you a favor by freeing you from your torment.” I believe this interpretation is consistent with the translation of the seventy. Regarding Aquila’s rendering of “seven times” and Symmachus’ mention of “in the seventh” avenging, some of our predecessors posit that Cain was slain in the seventh generation by Lamech. For from Adam came Cain, from Cain came Enoch, from Enoch Gaidad, and so forth until Lamech, the seventh from Adam who, according to Jewish tradition, went on to kill Cain—a confession Lamech himself later made: “I have killed a man for wounding me and a young man for injuring me; therefore, I will avenge Cain sevenfold, and Lamech seventy-seven times.”
Indeed, there is little doubt that Cain faced death or execution for his transgression by the seventh generation, enduring years of turmoil on the earth. We now discuss something you did not inquire about—with regard to the seventy-seven vengeances against Lamech. It is suggested that there are seventy-seven generations from Adam to Christ. Consulting the evangelist Luke confirms our assertion. Just as Cain’s sin was addressed in the seventh generation, for God does not inflict retribution twice for the same sin, so too the transgressions of Lamech and mankind, particularly the shedding of blood, were reconciled with the advent of Christ, who bore the sins of humanity, triumphantly went to the heavens after His sacrifice, demonstrating His victory before the angels who proclaimed, "Lift up your heads, O ye gates; and be ye lifted up, ye everlasting doors; and the King of glory shall come in."
A Jewish individual informed me that apocryphal texts recount how the flood took the lives of seventy-seven from Lamech's lineage, which can connect the completion of vengeance against him. Others interpret differently concerning Cain's seven vengeances, stating that his initial trespass was unjust division, followed by jealousy toward his brother, a wicked invitation to the field, the act of murder, insolent denial of guardianship, self-condemnation for his transgressions, and finally, his failure to repent, contrasting with Nineveh and Hezekiah who, upon receiving warning, repented and received God’s mercy.
It is said that God allowed Cain to live until the seventh generation to give him time to reflect upon his misfortunes and repent sincerely for forgiveness. Some scholars relate the number seven to completeness, asserting that whoever puts Cain to death liberates him from extreme suffering. Additionally, they often reference Peter’s inquiry in the Gospel regarding forgiveness, where Jesus responded, “I say not unto thee, Until seven times: but, Until seventy times seven.” They suggest that death and sin were suspended until the seventh generation when Enoch was taken and not found, as God transformed him.
Lastly, regarding the seventy weeks, there are interpretations hinting that the penalty of sin and death was defeated by Christ’s arrival. I provide this last commentary to ensure full coverage of the topic, for some scholars note various implications of the seventh year of mercy, the fiftieth year of jubilee, or the forty-ninth, correlating these numbers with the debts recorded in the Gospel: fifty and five hundred. They also point to the fifty penitential psalms and the significance of the eighth psalm commencement. Now, we conclude this discussion, presenting sufficient material for further contemplation, noting that Origen devoted much of his work on Genesis specifically to this query.