WEB
It happened, when the letter came to them, that they took the king’s sons, and killed them, even seventy persons, and put their heads in baskets, and sent them to him to Jezreel.
YLT
And it cometh to pass, at the coming in of the letter unto them, that they take the sons of the king, and slaughter seventy men, and put their heads in baskets, and send unto him to Jezreel,