question #2 Sahih al-Bukhari 2065, Book 34, Hadith 18 : How does Islam view the distribution of rewards among individuals involved in charitable acts?

The Prophet (ﷺ) said, “If a woman gives in charity from her house meals without wasting (i.e. being
extravagant), she will get the reward for her giving, and her husband will also get the reward for his
earning and the storekeeper will also get a similar reward. The acquisition of the reward of none of
them will reduce the reward of the others.”