King James Version (KJV)
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. {with...: Heb. before thee} {midst: Heb. heart}
Modern English
Then Joab said, “I’m not going to wait like this with you.” He took three darts in his hand, and thrust them through the heart of Absalom, while he was yet alive in the middle of the oak.
Hebrew
וַיֹּ֣אמֶר יוֹאָ֔ב לֹא־כֵ֖ן אֹחִ֣ילָה לְפָנֶ֑יךָ וַיִּקַּח֩ שְׁלֹשָׁ֨ה שְׁבָטִ֜ים בְּכַפּ֗וֹ וַיִּתְקָעֵם֙ בְּלֵ֣ב אַבְשָׁל֔וֹם עוֹדֶ֥נּוּ חַ֖י בְּלֵ֥ב הָאֵלָֽה׃
vayoʾmer yvoʾab loʾ-ken ʾoḥiylah lpaneyka vayiqaḥ shloshah shbaṭiym bkapvo vayitqaʿem bleb ʾabshalvom ʿvodenv ḥay bleb haʾelah