It is part of a cantana by Peterson, called "Love and Kindness", which was first published by Singspiration in 1976. It is now out of print, but copies are often available on Amazon.
The song is often sung with a distinct country-and-western feel. But it could be presented in other styles also.
Solo singer, C&W style, guitar accompaniment:
Family performance, piano accompaniment:
LyricsThe lyrics are copyright so cannot be reproduced here. But they are currently available on this website.
A rough outline is:
1 Helping the widows and orphans in their need ...
Cups of cold water given in Jesus name,
Cups of cold waters are never given in vain.
Someday in heaven when we meet the Lord,
Each deed of kindness will bring a rich reward.
2 Sharing the Gospel with sinners gone astray ...