“One person, on doing well by others, immediately accounts the expected favour in return. Another is not so quick, but still considers the person a debtor and knows the favour. A third kind of person acts as if not conscious of the deed, rather like a vine producing a cluster of grapes without making further demands, like a horse after its race, or a dog after its walk, or a bee after making its honey. Such a person, having done a good deed, won’t go shouting from the rooftops but simply moves on to the next deed just like the vine produces another bunch of grapes in the right season.” Marcus Aurelius, Meditations.
If you know what you do is right, then doing it is its own reward or return. No need to seek gratitude, validation or even acknowledgement from others. Enjoy the moment for what it is and look for another opportunity to give it again.