Sahih Muslim 1041
Sahih Muslim · Book 12: The Book of Zakat · It is disliked to beg from people
Abu Huraira reported Allah's Messenger (ﷺ) as saying:
حَدَّثَنَا أَبُو كُرَيْبٍ ، وَوَاصِلُ بْنُ عَبْدِ الأَعْلَى ، قَالاَ حَدَّثَنَا ابْنُ فُضَيْلٍ ، عَنْ عُمَارَةَ بْنِ، الْقَعْقَاعِ عَنْ أَبِي زُرْعَةَ ، عَنْ أَبِي هُرَيْرَةَ ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ سَأَلَ النَّاسَ أَمْوَالَهُمْ تَكَثُّرًا فَإِنَّمَا يَسْأَلُ جَمْرًا فَلْيَسْتَقِلَّ أَوْ لِيَسْتَكْثِرْ " .
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.