Matthew 12:30

"The man who is not with me is against me, and he who is not gathering with me is scattering abroad.

Luke 9:50

"Do not forbid him," said Jesus, "for he who is not against you is on your side."

Revelation 2:20-23

Yet I have this against you, that you tolerate the woman Jezebel, who calls herself a prophetess and by her teaching leads astray My servants, so that they commit fornication and eat what has been sacrificed to idols.

Treasury of Scripture Knowledge

Summary

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.

If ye be mine

Your master's sons

Bible References

If ye be mine

Matthew 12:30
"The man who is not with me is against me, and he who is not gathering with me is scattering abroad.
Luke 9:50
"Do not forbid him," said Jesus, "for he who is not against you is on your side."

Your master's sons

Revelation 2:20
Yet I have this against you, that you tolerate the woman Jezebel, who calls herself a prophetess and by her teaching leads astray My servants, so that they commit fornication and eat what has been sacrificed to idols.