2 Samuel 18:14

14 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.

Read 2 Samuel 18:14 Using Other Translations

Then said Joab, I may not tarry thus with thee. And he took three darts in his hand, and thrust them through the heart of Absalom, while he was yet alive in the midst of the oak.
Joab said, "I will not waste time like this with you." And he took three javelins in his hand and thrust them into the heart of Absalom while he was still alive in the oak.
“Enough of this nonsense,” Joab said. Then he took three daggers and plunged them into Absalom’s heart as he dangled, still alive, in the great tree.

What does 2 Samuel 18:14 mean?

John Gill's Exposition of the Bible
2 Samuel 18:14

Then said Joab, I may not tarry thus with thee
It is not worth while to talk with thee any longer, nor must I lose time, and neglect my opportunity; I do not desire you to go and smite him, I will go and do it myself:

and he took three darts in his hand;
or three rods, which were either all iron, or however the tops of them were iron spikes:

and thrust them through the heart of Absalom;
or through the midst of his body; for if he had thrust through his heart, properly speaking, he must have died instantly, whereas he seems to have lived after this:

while he [was] yet alive;
Joab found him alive when he came to him, and so he was when he thrust his darts through him; and so he was afterward; for the words may be rendered, "being yet alive", even after the darts were fixed in him, and even so deeply as to pierce through his body:

in the midst,
or "heart",

of the oak;
into which the darts penetrated.

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