C. F. Keil and Franz Delitzsch on 2 Kings 10:25

2Ki 10:25 כּכלּתו: when he (the sacrificing priest, not Jehu) had finished the burnt-offering (the singular suffix ו may also be taken as indefinite, when one had finished, vid., Ewald, §294, b.), Jehu commanded the runners and aides-de-camp: Come and smite them (the worshippers of Baal), without one coming out (escaping); whereupon they smote them with the edge of the sword, i.e., slew them unsparingly. ויּשׁליכוּ: and the runners and aides-de-camp threw (those who had been slain) away, and went into the citadel of the temple of Baal. בּית־הבּעל עיר cannot be the city of the temple of Baal, i.e., that part of the city in which the temple of Baal stood, for the runners were already in the court of the temple of Baal; but it is no doubt the temple-citadel, the true temple-house (עיר from עוּר, locus circumseptus) - templum Baalis magnifice exstructum instar arcis alicujus (Seb. Schm.).