The answer is: Simeon and Levi

Gen 34:25-26

In the intriguing tale from Genesis 34, we see one of the more dramatic moments in Jacob’s family history. After the violation of Jacob’s daughter Dinah by Shechem, her brothers Simeon and Levi felt a fierce compulsion for justice—or perhaps unjust retribution. Their decision to deceive the men of Shechem by tricking them into circumcision speaks to the intense premiere of loyalty within familial bonds; a force that drives these brothers to exact an extreme form of revenge.

Interestingly, their actions didn’t just demonstrate loyalty; it set the stage for their reputations within Israel's narrative. Simeon and Levi’s vendetta not only impacts their own legacy, but through their mother Leah, they also bear the burden of violent tendencies—a juxtaposition to the peaceful intentions behind many of their later descendants. Their fierce deeds resulted in their tribes being scattered within Israel, highlighting a profound biblical principle that retribution often comes with long-lasting repercussions.

As for a bit of trivia, did you know that Levi ultimately became the tribe of priests? From their violent origins, they transitioned into a crucial part of worship in Israel. It must have been quite a transformative journey, reminding us that redemption is possible, even for those whose paths start muddied by vengeance. Also, this story of blood vengeance shows echoes of various societies in ancient Near Eastern customs around honor and consequence—revealing how strikingly similar human experiences can be across cultures and millennia.