2 Kings 10:7-8

10:7 When they received the letter, they seized the king’s sons and executed all seventy of them. They put their heads in baskets and sent them to him in Jezreel. 10:8 The messenger came and told Jehu, “They have brought the heads of the king’s sons.” Jehu said, “Stack them in two piles at the entrance of the city gate until morning.”

2 Kings 19:37

19:37 One day, as he was worshiping in the temple of his god Nisroch, his sons Adrammelech and Sharezer struck him down with the sword. They escaped to the land of Ararat; his son Esarhaddon replaced him as king.