Surah At-Tawbah — Ayah 79 (9:79)
ٱلَّذِينَ يَلۡمِزُونَ ٱلۡمُطَّوِّعِينَ مِنَ ٱلۡمُؤۡمِنِينَ فِي ٱلصَّدَقَٰتِ وَٱلَّذِينَ لَا يَجِدُونَ إِلَّا جُهۡدَهُمۡ فَيَسۡخَرُونَ مِنۡهُمۡ سَخِرَ ٱللَّهُ مِنۡهُمۡ وَلَهُمۡ عَذَابٌ أَلِيمٌ ٧٩
English translation (Saheeh International)
Those who criticize the contributors among the believers concerning [their] charities and [criticize] the ones who find nothing [to spend] except their effort, so they ridicule them - Allāh will ridicule them, and they will have a painful punishment.
Brief commentary
Those who find fault with the believers who voluntarily give a little charity, who only find a little that they are able to give, and they poke fun at them – saying: Of what use is their charity? – Allah mocks them in return for their mocking the believers; and they will receive a painful punishment.