Reminding people of one’s kindness

Those who break Allah’s Covenant after accepting it, and who cut aside what Allah has ordered to be united and cause corruption on earth. It is they who are the losers. 2:27

O believers! Do not make your charity worthless by reminders of your generosity or by injury to the recipients feelings, like those who spend their wealth to be seen by people and believe neither in Allah nor in the Last Day. Their parable is like a hard barren rock covered with thin layer of soil; a heavy rain falls, leaving it just a bare stone. Such people will not gain any reward that they thought they had earned. Allah does not guide the unbelievers. 2:264
Meaning:-
Parable: a simple story used to illustrate a moral or spiritual lesson
Barren: unproductive, infertile, unfruitful
Covenant: commitment, promise, an agreement, pledge.