Sharing the Evangel?
A drink of water can be that. Especially if a man is near death and thirsty. Water is not good news to a man who craves steak.
(Mat 10:42) 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."
(Mar 9:41) For truly, I say to you, whoever gives you a cup of water to drink because you belong to Christ will by no means lose his reward.
Mr Norseman:
If you would like to start a new OP about this, I would like to advance the proposal that these "little ones" in Matthew 25 are not just people indiscriminately but are evangelists/missionaries going out for the Sake of the Name. On the Last Judgment how we receive Gospel Messengers will determine how God disposes of us.