He who begs the riches of others to increase his own is asking only for live coals, so let him ask a little or much. (Using translation from Muslim 1041)
قَالَ رَسُولُ اللهِ ﷺ مَنْ سَأَلَ النَّاسَ أَمْوَالَهُمْ تَكَثُّرًا فَإِنَّمَا يَسْأَلُ جَمْرًا فَلْيَسْتَقِلَّ مِنْهُ أَوْ لِيَسْتَكْثِرْ