Matthew 12:30

He that is not with Me is against Me; and he that gathers not with Me scatters.

Luke 9:50

And Jesus said to him, "Forbid him not: for he who is not against you is for you."

Revelation 2:20-23

But I have it against you, that you suffer the woman Jezebel, who calls herself a prophetess; and she teaches and seduces My servants to commit fornication, and to eat idol-sacrifices.

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
He that is not with Me is against Me; and he that gathers not with Me scatters.
Luke 9:50
And Jesus said to him, "Forbid him not: for he who is not against you is for you."

Your master's sons

Revelation 2:20
But I have it against you, that you suffer the woman Jezebel, who calls herself a prophetess; and she teaches and seduces My servants to commit fornication, and to eat idol-sacrifices.