3 John 1:6-8

and they have testified before the church of your love and friendship. You will do well to [assist them and] send them on their way in a manner worthy of God. For these [traveling missionaries] went out for the sake of the Name [of Christ], accepting nothing [in the way of assistance] from the Gentiles. So we ought to support such people [welcoming them as guests and providing for them], so that we may be fellow workers for the truth [that is, for the gospel message of salvation].