Matthew 12:30

And the one not being with me is against me; and the one not gathering with me scatters abroad.

Luke 9:50

And Jesus said to him, Forbid him not; for whosoever is not against us is on our side.

Revelation 2:20-23

But I have it against you, that you suffer the woman Jezebel, who says herself to be a prophet, and teaches and deceives my servants to commit fornication, and to cat things 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
And the one not being with me is against me; and the one not gathering with me scatters abroad.
Luke 9:50
And Jesus said to him, Forbid him not; for whosoever is not against us is on our side.

Your master's sons

Revelation 2:20
But I have it against you, that you suffer the woman Jezebel, who says herself to be a prophet, and teaches and deceives my servants to commit fornication, and to cat things sacrificed to idols.