What does 2 Samuel 20:10 mean?

Amasa didn’t see the sword in Joab’s other hand. Joab stabbed him in the stomach, spilling his insides on the ground. He didn’t need to stab him again—Amasa died instantly. Then Joab and his brother Abishai chased after Sheba, son of Bichri. 2 Samuel 20:10 - Modern Text Bible

(Joab murders Amasa with a single blow, removing his rival and taking command to pursue Sheba.)