Then said Abishai to David, God hath delivered thine enemy into thine hand this day: now therefore let me smite him, I pray thee, with the spear even to the earth at once, and I will not smite him the second time. God hath delivered thine enemy into thine hand - Here Abishai uses the same language as did David's men, when Saul came into the cave at En-gedi, (see 1 Samuel 24:4, etc.), and David uses the same language in reply.
Related Commentaries of 1 Samuel 26:8
1 Samuel 26:8
8 Then said Abishai to David, God hath deliveredb thine enemy into thine hand this day: now therefore let me smite him, I pray thee, with the spear even to the earth at once, and I will not smite him the second time.