At Tawbah, 79 Ayah
9:79
ٱلَّذِينَ يَلۡمِزُونَ ٱلۡمُطَّوِّعِينَ مِنَ ٱلۡمُؤۡمِنِينَ فِي ٱلصَّدَقَٰتِ وَٱلَّذِينَ لَا يَجِدُونَ إِلَّا جُهۡدَهُمۡ فَيَسۡخَرُونَ مِنۡهُمۡ سَخِرَ ٱللَّهُ مِنۡهُمۡ وَلَهُمۡ عَذَابٌ أَلِيمٌ ٧٩
Al-Ladhīna Yalmizūna Al-Muţţawwi`īna Mina Al-Mu'uminīna Fī Aş-Şadaqāti Wa Al-Ladhīna Lā Yajidūna 'Illā Juhdahum Fayaskharūna Minhum ۙ Sakhira Al-Lahu Minhum Wa Lahum `Adhābun 'Alīmun
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 - Allah will ridicule them, and they will have a painful punishment.