Introduction:
Abner, son of Ner, is a prominent figure in the Old Testament, particularly in the historical narratives of 1 and 2 Samuel. He is best known as the commander of Saul's army and a key player in the power struggles following Saul's death. His account is intertwined with the rise of David to kingship over Israel.

Family and Background:
Abner was the son of Ner, who was Saul's uncle, making Abner Saul's cousin. This familial connection positioned him as a trusted military leader and advisor to King Saul. His loyalty to Saul and his house is a defining aspect of his character throughout the biblical narrative.

Role in Saul's Reign:
Abner first appears in the biblical text as the commander of Saul's army. His military prowess and leadership are evident in several accounts, including his presence at the battle against the Philistines where David famously defeats Goliath (1 Samuel 17:55-57). Abner's role as a military leader is further highlighted in 1 Samuel 14:50, which states, "The name of Saul’s wife was Ahinoam daughter of Ahimaaz. The name of the commander of his army was Abner son of Ner, Saul’s uncle."

Conflict with David:
Following Saul's death, Abner initially supports Ish-bosheth, Saul's son, as king over Israel, opposing David's claim to the throne. This allegiance leads to a prolonged conflict between the house of Saul and the house of David. Abner's loyalty to Ish-bosheth is tested when Ish-bosheth accuses him of sleeping with Saul's concubine, Rizpah. Feeling insulted, Abner decides to defect to David's side, offering to help unite the kingdom under David's rule (2 Samuel 3:6-12).

Alliance with David:
Abner's defection is a turning point in the struggle for the throne. He meets with David and promises to rally the tribes of Israel to David's kingship. David accepts Abner's offer, and they make a covenant. This is recorded in 2 Samuel 3:21: "Then Abner said to David, 'Let me go at once, and I will gather all Israel to my lord the king, so that they may make a covenant with you, and you may rule over all that your heart desires.' So David sent Abner away in peace."

Death and Legacy:
Despite his new alliance with David, Abner's life is cut short by Joab, David's military commander. Joab kills Abner in Hebron, seeking revenge for the death of his brother Asahel, whom Abner had killed in battle (2 Samuel 3:27). David mourns Abner's death and distances himself from the murder, declaring, "I and my kingdom are forever guiltless before the LORD concerning the blood of Abner son of Ner" (2 Samuel 3:28).

Abner's death marks the end of a significant chapter in the transition of power from the house of Saul to the house of David. His actions and decisions played a crucial role in the unification of Israel under David's rule, and his account is a testament to the complex political and personal dynamics of the time.