NET
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.
Darby
7 And it came to pass when the letter came to them, that they took the king's sons, and slaughtered seventy persons, and put their heads in baskets, and sent them to him to Jizreel.
KJV
7 And it came to pass, when the letter came to them, that they took the king's sons, and slew seventy persons, and put their heads in baskets, and sent him [them] to Jezreel.