GOD'S WORD® Translation
I can guarantee this truth: Whoever gives you a cup of water to drink because you belong to Christ will certainly not lose his reward."

American Standard Version
For whosoever shall give you a cup of water to drink, because ye are Christ's, verily I say unto you, he shall in no wise lose his reward.

Berean Study Bible
Indeed, if anyone gives you even a cup of water because you bear the name of Christ, truly I tell you, he will never lose his reward.

Douay-Rheims Bible
For whosoever shall give you to drink a cup of water in my name, because you belong to Christ: amen I say to you, he shall not lose his reward.

English Revised Version
For whosoever shall give you a cup of water to drink, because ye are Christ's, verily I say unto you, he shall in no wise lose his reward.

King James Bible
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.

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.

Young's Literal Translation
for whoever may give you to drink a cup of water in my name, because ye are Christ's, verily I say to you, he may not lose his reward;

Mark 9:41 Additional Translations ...