2 Kings 10:5-9

And the one who was in charge of the household, and the one who was in charge of the city, and the elders, and the guardians of the children, sent word to Jehu, saying, “We are your servants, and everything that you tell us we will do. We will not appoint any man king; do what is good in your sight.”

Then he wrote them a letter a second time, saying, “If you are on my side, and will listen to my voice, take the heads of the men, your master’s sons, and come to me at Jezreel about this time tomorrow.” Now the king’s sons, seventy men, were with the great people of the city, who were raising them.

When the letter came to them, they took the king’s sons and slaughtered them, seventy men, and put their heads in baskets, and sent them to him at Jezreel.

When the messenger came and informed him, saying, “They have brought the heads of the king’s sons,” he said, “Put them in two heaps at the entrance of the gate until morning.”

Now in the morning he went out and stood and said to all the people, “You are innocent; behold, I conspired against my master and killed him, but who killed all these?