Only Phrases

Meaning
This is used for someone who helps others without thinking of the reward or appreciation

Origin
The Bible uses this phrase Luke 10:30/33 (King James Version):
A certain man went down from Jerusalem to Jericho, and fell among thieves, which stripped him of his raiment, and wounded him, and departed, leaving him half dead… But a certain Samaritan, as he journeyed, came where he was: and when he saw him, he had compassion on him.