NET

6 He wrote them a second letter, saying, “If you are really on my side and are willing to obey me, then take the heads of your master’s sons and come to me in Jezreel at this time tomorrow.” Now the king had seventy sons, and the prominent men of the city were raising them.

Darby

6 And he wrote a letter the second time to them saying, If ye are mine, and will hearken to my voice, take the heads of the men your master's sons, and come to me to Jizreel to-morrow at this time. Now the king's sons, seventy persons, were with the great men of the city, who brought them up.

KJV

6 Then he wrote a letter the second time to them, saying, If ye [be] mine, and [if] ye will hearken unto my voice, take ye the heads of the men your master's sons, and come to me to Jezreel by to morrow this time. Now the king's sons, [being] seventy persons, [were] with the great men of the city, which brought them up.