Mark 9:41
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. 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.
Even a small act of kindness done in Christ's name for someone because that person belongs to Christ will be rewarded, and no such service loses its reward. Humble service done faithfully in the work God assigns, even when it goes unnoticed, will not lose its reward. Disciples need not worry whether their efforts appear successful or great, since the good accomplished by their words and conduct may become clear only when rewards are given. The promise stands joined to the warning not to hinder a fellow worker merely because that person does not follow one's own plans or group.