2 Kings (Author Compiled by Isaiah and Jeremiah from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
10:7And 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,
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.