Mark 9:41 in the World English Bible
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.
Context
40 For he that is not against us is on our part.
41 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.
42 And whosoever shall offend one of these little ones that believe in me, it is better for him that a millstone were hanged about his neck, and he were cast into the sea.