Allah Almighty says: {O you who believe, do not nullify your charities with reminders and hurtful words} [Surat al-Baqarah: 264] He also says: {Those who spend their wealth for the sake of Allah, then do not follow up their charity with reminders of generosity or hurtful words} [Surat al-Baqarah: 262]
1) Reminding others of the gifts and charity cancels their reward, and it is one of the major sins.
2) Spending in charity without reminding the recipient of the favor done to him is one of the characteristics of the sincere believers.
1588/1- Abu Dharr (may Allah be pleased with him) reported that the Prophet (may Allah’s peace and blessings be upon him) said: “There are three to whom Allah will neither speak on the Day of Resurrection nor will He look at them nor purify them, and they will have a painful punishment.” When he repeated this (statement) thrice, Abu Dharr said: “They are doomed and destroyed! Who are they, O Messenger of Allah?” He said: “One whose garment trails; one who reminds others of his favors to them; and one who promotes sale of his merchandise by taking false oaths.” [Narrated by Muslim]
In another version by Muslim: “One whose Izār trails.” This refers to a person who lets his waist wrapper and his outer garment reach below his ankles out of arrogance.
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1) The Hadīth includes severe threat against those who remind others of their favors because it renders the deeds worthless.
2) Muslims are urged to give in charity gracefully without reminding of it.