Cross reference
Luke 11:23
23 He who is not with me is against me, and he who will not give me help in getting people together is driving them away.
Matthew 12:30
30 Whoever is not with me is against me; and he who does not take part with me in getting people together, is driving them away.
Luke 9:50
50 But Jesus said to him, Let him do it, for he who is not against you is for you.
Mark 9:40
40 He who is not against us is for us.
Revelation 3:15-16
15 I have knowledge of your works, that you are not cold or warm: it would be better if you were cold or warm.
16 So because you are not one thing or the other, I will have no more to do with you.