C. F. Keil and Franz Delitzsch on 2 Kings 10:32-33

2Ki 10:32-33

Therefore (this link of connection follows from the actual fact, though it is not distinctly mentioned in the text) Hazael had now to inflict chastisement upon faithless Israel. In Jehu’s days Jehovah began “to cut off in Israel,” i.e., to rend away certain portions from the kingdom. “Hazael smote them (the Israelites) on the whole of the border of Israel,” i.e., of the kingdom, “from Jordan to the sun-rising (i.e., on the eastern side of the Jordan), the whole of the land of Gilead (כּל־ארץ את is dependent upon יכּה which must be supplied from יכּם), namely, the territory of the tribes of Gad, Reuben, and Half-Manasseh, from Aroer on the brook Arnon (now Araayr, a ruin on the northern border of the Mojeb (Arnon) valley; see at Num 32:34), the southern border of the Israelitish land to the east of the Jordan (Deu 2:36; Deu 3:12), both Gilead and Bashan,” the two countries into which Gilead in the broader sense was divided (see at Deu 3:8-17). - These conquests took place during the twenty-eight years’ reign of Jehu, since Hazael began to reign before Jehu, viz., while Joram was king, and had already fought successfully against the Israelites at Ramoth in Joram’s reign (2Ki 8:28-29), but not in the later part of Jehu’s reign, as Thenius supposes.