Then Jehu called a meeting of all the people of the city and said to them, "Ahab hardly worshiped Baal at all compared to the way I will worship him!
Summon all the prophets and worshipers of Baal, and call together all his priests. See to it that every one of them comes, for I am going to offer a great sacrifice to Baal. Any of Baal's worshipers who fail to come will be put to death." But Jehu's plan was to destroy all the worshipers of Baal.
Then Jehu ordered, "Prepare a solemn assembly to worship Baal!" So they did.
He sent messengers throughout all Israel summoning those who worshiped Baal. They all came and filled the temple of Baal from one end to the other.
And Jehu instructed the keeper of the wardrobe, "Be sure that every worshiper of Baal wears one of these robes." So robes were given to them.
Then Jehu went into the temple of Baal with Jehonadab son of Recab. Jehu said to the worshipers of Baal, "Make sure that only those who worship Baal are here. Don't let anyone in who worships the LORD!"
So they were all inside the temple to offer sacrifices and burnt offerings. Now Jehu had surrounded the building with eighty of his men and had warned them, "If you let anyone escape, you will pay for it with your own life."
As soon as Jehu had finished sacrificing the burnt offering, he commanded his guards and officers, "Go in and kill all of them. Don't let a single one escape!" So they killed them all with their swords, and the guards and officers dragged their bodies outside. Then Jehu's men went into the fortress of the temple of Baal.
References for 2 Kings 10:25
They dragged out the sacred pillar used in the worship of Baal and destroyed it.
They broke down the sacred pillar of Baal and wrecked the temple of Baal, converting it into a public toilet. That is what it is used for to this day.
Thus, Jehu destroyed every trace of Baal worship from Israel.
He did not, however, destroy the gold calves at Bethel and Dan, the great sin that Jeroboam son of Nebat had led Israel to commit.
Nonetheless the LORD said to Jehu, "You have done well in following my instructions to destroy the family of Ahab. Because of this I will cause your descendants to be the kings of Israel down to the fourth generation."
But Jehu did not obey the law of the LORD, the God of Israel, with all his heart. He refused to turn from the sins of idolatry that Jeroboam had led Israel to commit.
At about that time the LORD began to reduce the size of Israel's territory. King Hazael conquered several sections of the country
east of the Jordan River, including all of Gilead, Gad, Reuben, and Manasseh. He conquered the area from the town of Aroer by the Arnon Gorge to as far north as Gilead and Bashan.
The rest of the events in Jehu's reign and all his deeds and achievements are recorded in The Book of the History of the Kings of Israel.
When Jehu died, he was buried with his ancestors in Samaria. Then his son Jehoahaz became the next king.
In all, Jehu reigned over Israel from Samaria for twenty-eight years.