Mark 9:41 in the King James Version
For whosoever shall give you a cup of water to drink in my name, because ye belong to Christ, verily I say unto you, he shall not lose his reward.
Context
40 For whoever is not against us is on our side.
41 For whoever will give you a cup of water to drink in my name because you are Christ’s, most certainly I tell you, he will in no way lose his reward.
42 “Whoever will cause one of these little ones who believe in me to stumble, it would be better for him if he were thrown into the sea with a millstone hung around his neck.