'Seventy' in the Bible

And Ahab hath seventy sons in Samaria, and Jehu writeth letters, and sendeth to Samaria, unto the heads of Jezreel, the elders, and unto the supporters of Ahab, saying,

And he writeth unto them a letter a second time, saying, 'If ye are for me, and to my voice are hearkening, take the heads of the men -- the sons of your lord, and come unto me about this time to-morrow, to Jezreel;' and the sons of the king are seventy men, with the great ones of the city those bringing them up.

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,