New Revised Standard Version
Then he wrote them a second letter, saying, “If you are on my side, and if you are ready to obey me, take the heads of your master’s sons and come to me at Jezreel tomorrow at this time.” Now the king’s sons, seventy persons, were with the leaders of the city, who were charged with their upbringing.

Contemporary English Version
Jehu then wrote another letter which said, "If you are on my side and will obey me, then prove it. Bring me the heads of the descendants of Ahab! And be here in Jezreel by this time tomorrow." The 70 descendants of King Ahab were living with some of the most important people of the city.

New American Bible
So Jehu wrote them a second letter: “If you are on my side and will obey me, bring along the heads of your master’s sons and come to me in Jezreel at this time tomorrow.” (The seventy princes were in the care of prominent men of the city, who were rearing them.)

Douay-Rheims Bible
And he wrote letters the second time to them, saying: If you be mine, and will obey me, take the heads of the sons of your master, and come to me to Jezrahel by tomorrow at this time. Now the king's sons, being seventy men, were brought up with the chief men of the city.

And he wrote letters the second time to them, saying: If you be mine, and will obey me, take the heads of the sons of your master, and come to me to Jezrahel by tomorrow at this time. Now the king's sons, being seventy men, were brought up with the chief men of the city.

If ye be mine [heb] if ye be for me

2 Kings 9:32 And Jehu lifted up his face to the window, and said: Who is this? And two or three eunuchs bowed down to him.

Matthew 12:30 He that is not with me, is against me: and he that gathereth not with me, scattereth.

Luke 9:50 And Jesus said to him: Forbid him not: for he that is not against you is for you.

take ye

Numbers 25:4 Said to Moses: Take all the princes of the people, and hang them up on gibbets against the sun: that my fury may be turned away from Israel.

1 Kings 21:8-11 So she wrote letters in Achab's name, and sealed them with his ring, and sent them to the ancients, and the chief men that were in his city, and that dwelt with Naboth. . . .

your master's sons

Deuteronomy 5:9 Thou shalt not adore them, and thou shalt not serve them. For I am the Lord thy God, a jealous God, visiting the iniquity of the fathers upon their children unto the third and fourth generation, to them that hate me,

Joshua 7:24,25 Then Joshua, and all Israel with him, took Achan, the son of Zare, and the silver, and the garment, and the golden rule, his sons also, and his daughters, his oxen, and asses, and sheep, the tent also, and all the goods: and brought them to the valley of Achor: . . .

Job 21:19 God shall lay up the sorrow of the father for his children: and when he shall repay, then shall he know.

Isaiah 14:21,22 Prepare his children for slaughter for the iniquity of their fathers: they shall not rise up, nor inherit the land, nor fill the face of the world with cities. . . .

Revelation 2:20-23 But I have against thee a few things: because thou sufferest the woman Jezabel, who calleth herself a prophetess, to teach and to seduce my servants, to commit fornication and to eat of things sacrificed to idols. . . .

which brought them up.