'Slaughtered' in the Bible

Now the king's sons, totaling 70 men, were living with the leading men of the city, who were their guardians. When the letter from Jehu arrived, the city leaders arrested the king's sons, slaughtered all 70 of them, put their heads in baskets, and sent them to Jehu at Jezreel.

Jehu replied, "Put them in two piles at the entrance of the city gate until morning." The next morning, Jehu went out, stood still, and announced to all the people: "Are you righteous? I conspired against my master and killed him, but who slaughtered all of these?

After he had slaughtered all the priests who served at the high places and burned their bones on those high places, he returned to Jerusalem.