Matthew 10:42

And whoever shall give, even to one of the least of these, a cup of cold water to drink, solely in the name of a disciple: Amen I say to you, he shall not lose his reward.

Other versions

King James Version

And whosoever shall give to drink unto one of these little ones a cup of cold water only in the name of a disciple, verily I say unto you, he shall in no wise lose his reward.

English Standard Version

And whoever gives one of these little ones even a cup of cold water because he is a disciple, truly, I say to you, he will by no means lose his reward."

New International Version

And if anyone gives even a cup of cold water to one of these little ones because he is my disciple, I tell you the truth, he will certainly not lose his reward."