2 Samuel 2:23-25

When he refused to quit, Abner struck him in the belly with the blunt end of his spear so hard that it came out his back. Asahel fell to the ground and died at once. Everyone who arrived at the spot where Asahel fell and died stood and gaped—Asahel dead! But Joab and Abishai kept up the chase after Abner. As the sun began to set, they came to the hill of Ammah that faced Giah on the road to the backcountry of Gibeon. The Benjaminites had taken their stand with Abner there, deployed strategically on a hill.