Asahel pursued Abner and refused repeated warnings to turn aside. Abner struck him with the butt of his spear, and Asahel died. See 2 Samuel 2:19–23.
In 2 Samuel 2:18–23, Asahel, one of Zeruiah’s three sons, uses his speed to chase Abner relentlessly. Abner recognizes him and repeatedly urges him to break off and instead seize armor from another fighter. Asahel refuses, staying fixed on Abner. This episode sits inside a larger account of conflict after Saul’s death, when rival leadership centers form and fighting breaks out between groups aligned with David and with Saul’s former house.
This scene is part of a civil conflict after Saul’s death, where personal actions on the battlefield can reshape future relationships.
A careful answer keeps the immediate passage, the book's argument, and the whole-Bible storyline together, so the question is answered in context instead of as a detached idea.
Start with 2 Samuel 2:19-23, then read the surrounding section so the answer stays connected to the passage's flow.
19Asahel pursued after Abner; and in going he didn`t turn to the right hand nor to the left from following Abner.
20Then Abner looked behind him, and said, Is it you, Asahel? He answered, It is I.
21Abner said to him, Turn you aside to your right hand or to your left, and lay you hold on one of the young men, and take you his armor. But Asahel would not turn aside from following him.
22Abner said again to Asahel, Turn you aside from following me: why should I strike you to the ground? how then should I hold up my face to Joab your brother?
23However he refused to turn aside: why Abner with the hinder end of the spear struck him in the body, so that the spear came out behind him; and he fell down there, and died in the same place: and it happened, that as many as came to the place where Asahel fell down and died stood still.