A good deed is never lost

वने रणे शत्रुजलाग्निमध्ये
महार्णवे पर्वतमस्तके वा ।
सुप्तं प्रमत्तं विषमस्थितं वा
रक्षन्ति पुण्यानि पुरा कृतानि ॥

- नीतिशतकम्

The good deeds done by a person in the past always protect him whether he is in a forest, battlefield, deep ocean or top of a mountain; whether he is amidst enemies, fire or flood; whether he is asleep, unconscious or any odd condition.

A good deed is never lost.
No act of kindness, no matter how small, is ever wasted.