ALLAH 
SAYS: “O you who believe, do not nullify your charity by reminders of your kindness or by annoyance.” [1].The commentators say that this means “do not nullify its reward”.
SAYS: “O you who believe, do not nullify your charity by reminders of your kindness or by annoyance.” [1].The commentators say that this means “do not nullify its reward”.
We relate in the Ṣaḥīḥ of Muslim that Abū Dharr 
reported that the Messenger of Allah 
said: “There are three people whom on the Day of Rising Allah will not talk to, look at or purify, and who will have a painful punishment.” He said this three times. Abū Dharr said: “They have failed and they are lost. Who are they, Messenger of Allah?” He replied: “Someone who lets his garment trail below his ankles; someone who gives charity and then reminds the recipient [about it]; and someone who sells his merchandise using false oaths.” [2].
reported that the Messenger of Allah said: “There are three people whom on the Day of Rising Allah will not talk to, look at or purify, and who will have a painful punishment.” He said this three times. Abū Dharr said: “They have failed and they are lost. Who are they, Messenger of Allah?” He replied: “Someone who lets his garment trail below his ankles; someone who gives charity and then reminds the recipient [about it]; and someone who sells his merchandise using false oaths.” [2].References
[1] Qur’ān 2:264.
[2] Muslim (106).