The answer is: Murdering her husband and family

1 Sam 25:21-34

Abigail emerges in 1 Samuel 25 as a remarkable figure of wisdom and bravery. When the infamous Nabal rejected David’s request for provisions from his herds, David was incensed and set out with plans for vengeance—a response all too typical for those who battled to survive in the often harsh landscape of ancient Israel. Heart stirringly, Abigail steps into this narrative where she becomes a peacemaker.

She wisely intercepts David with gifts and words of counsel, positioning herself as a diplomat seeking to avert what could have escalated into tragedy. Abigail's actions not only saved her family from destruction but also redirected the trajectory of David’s anger. Her epiphany comes through humility and a plea for clemency, as she reminds David that violence would mar his future legacy.

Interestingly, the name “Abigail” means "my father's joy." What a fitting title—delivering both wisdom and sustenance at a bleak moment. This encounter constructs a powerful biblical echo as one of the ultimate framers of peaceful dispute resolution. Abigail’s intelligence and beauty are noted eloquently, matching her decisive might—a true heroine! Furthermore, this illustrates God's themes of justice and mercy: even in dire straits requiring firmness, mercy emerges as a pathway to redemption and care for others’ lives. Abigail's story serves as an encouragement for thoughtful engagement over instinctive aggression, leaving an indelible mark on Biblical literature as an arbiter of peace.