וַיְמָאֵ֣ן לָס֗וּר וַיַּכֵּ֣הוּ אַבְנֵר֩ בְּאַחֲרֵ֨י הַחֲנִ֜ית אֶל־הַחֹ֗מֶשׁ וַתֵּצֵ֤א הַֽחֲנִית֙ מֵאַחֲרָ֔יו וַיִּפָּל־שָׁ֖ם וַיָּ֣מָת תחתו [תַּחְתָּ֑יו] וַיְהִ֡י כָּל־הַבָּ֣א אֶֽל־הַמָּקוֹם֩ אֲשֶׁר־נָ֨פַל שָׁ֧ם עֲשָׂהאֵ֛ל וַיָּמֹ֖ת וַֽיַּעֲמֹֽדוּ׃
Howbeit he refused to turn aside; wherefore Abner with the hinder end of the spear smote him in the groin, that the spear came out behind him; and he fell down there, and died in the same place; and it came to pass, that as many as came to the place where Asahel fell down and died stood still.
Rashi
The fourth, etc., was Asahel, the brother of Joab, and Zebadiah his son after him for Asahel was assassinated at the beginning of his reign, for Abner assassinated him, (II Sam. 2:23) and he [David] appointed Zebadiah his son in his stead over his division.
Rashi
The race is not to the swift. Isohel’s swiftness30See II Shmuel 2:18. did not avail him when his time [to die] arrived.31His swiftness allowed him to catch up with Avneir, who killed him. See II Shmuel 2:23.