John said to him, “Teacher, we saw someone driving out demons in your name, and we tried to prevent him because he does not follow us.”
Jesus replied, “Do not prevent him. There is no one who performs a mighty deed in my name who can at the same time speak ill of me. For whoever is not against us is for us. Anyone who gives you a cup of water to drink because you belong to Christ, amen, I say to you, will surely not lose his reward”. Mark 9:38-41.