But there was none like unto Ahab, which did sell himself to work wickedness in the sight of the Lord, whom Jezebel his wife stirred up. (1 Kings 21:25)
Sin was a fire that flamed in the heart of Ahab, but Jezebel saw to it that that flame was continually stirred so that it burned at its greatest intensity. It was through the influence of Jezebel that Ahab was induced to adopt the worship of Baal (ch. 16:31), to permit the slaying of prophets of God (ch. 18:4), to allow Elijah to be driven into banishment (ch. 19:2), and finally to murder Naboth and seize his land (ch. 21:7, 15).
None like unto Ahab.
Verses 25 and 26 are a parenthesis, bringing out the reason for the terrible fate that met the house of Ahab.