Joab killed Absalom and did not care the word of David

2 Samuel 18:1-18

But the men said, “You must not go out; if we are forced to flee, they won’t care about us. Even if half of us die, they won’t care; but you are worth ten thousand of us. It would be better now for you to give us support from the city.”

The king answered, “I will do whatever seems best to you.”

The king commanded Joab, Abishai and Ittai, “Be gentle with the young man Absalom for my sake.” And all the troops heard the king giving orders concerning Absalom to each of the commanders.

Now Absalom happened to meet David’s men. He was riding his mule, and as the mule went under the thick branches of a large oak, Absalom’s hair got caught in the tree. He was left hanging in midair, while the mule he was riding kept on going.

But the man replied, “Even if a thousand shekels[c] were weighed out into my hands, I would not lay a hand on the king’s son. In our hearing the king commanded you and Abishai and Ittai, ‘Protect the young man Absalom for my sake.

Joab said, “I’m not going to wait like this for you.” So he took three javelins in his hand and plunged them into Absalom’s heart while Absalom was still alive in the oak tree. And ten of Joab’s armor-bearers surrounded Absalom, struck him and killed him.

During his lifetime Absalom had taken a pillar and erected it in the King’s Valley as a monument to himself, for he thought, “I have no son to carry on the memory of my name.” He named the pillar after himself, and it is called Absalom’s Monument to this day.

Why?

David's troops protect David more than their own life. they are the real soldiers and fighters.

Joab does it in his own way and doesn't care about the king's command, David.

Absalom took a pillar as his own memory, his beautiful hair caused him to die. The problem of Absalom did not depend on the Lord but depended on himself, so he failed.

How?

Any benefit is good to us or bad to us depending on the Lord's way. Trust in the Lord is our best talent and capability.