Quran At-Tawbah 9:79
ٱلَّذِينَ يَلۡمِزُونَ ٱلۡمُطَّوِّعِينَ مِنَ ٱلۡمُؤۡمِنِينَ فِي ٱلصَّدَقَٰتِ وَٱلَّذِينَ لَا يَجِدُونَ إِلَّا جُهۡدَهُمۡ فَيَسۡخَرُونَ مِنۡهُمۡ سَخِرَ ٱللَّهُ مِنۡهُمۡ وَلَهُمۡ عَذَابٌ أَلِيمٌ ٧٩
Translation
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.