Luke 9:46-50 NIV

[46] An argument started among the disciples as to which of them would be the greatest. [47] Jesus, knowing their thoughts, took a little child and had him stand beside him. [48] Then he said to them, “Whoever welcomes this little child in my name welcomes me; and whoever welcomes me welcomes the one who sent me. For it is the one who is least among you all who is the greatest.” [49] “Master,” said John, “we saw someone driving out demons in your name and we tried to stop him, because he is not one of us.” [50] “Do not stop him,” Jesus said, “for whoever is not against you is for you.”