"The Messenger of Allah said: 'if one of you were to carry a bundle of firewood on his back and sell it, that would be better than asking a man who may or may not give him something."' (Using translation from Nasāʾī 2584)  

قَالَ رَسُولُ اللهِ ﷺ «لَأَنْ يَحْتَزِمَ أَحَدُكُمْ بِحُزْمَةِ حَطَبٍ فَيَحْمِلَهَا عَلَى ظَهْرِهِ فَيَبِيعَهَا خَيْرٌ مِنْ أَنْ يَسْأَلَ رَجُلًا فَيُعْطِيَهُ أَوْ يَمْنَعَهُ»  

The person would continue begging from people till he would come on the Day of Resurrection and there would be no flesh on his face. (Using translation from Muslim 1040c)  

قَالَ رَسُولُ اللهِ ﷺ «مَا يَزَالُ الرَّجُلُ يَسْأَلُ حَتَّى يَأْتِيَ يَوْمَ الْقِيَامَةِ لَيْسَ فِي وَجْهِهِ مُزْعَةُ لَحْمٍ»  

a man came to the prophet and asked him and he gave him, and when he placed his foot on the threshold the Messenger of Allah said: "If you knew how bad begging is, no one would go to anyone else and ask him for anything." (Using translation from Nasāʾī 2586)  

أَنَّ رَجُلًا أَتَى النَّبِيَّ ﷺ فَسَأَلَهُ فَأَعْطَاهُ فَلَمَّا وَضَعَ رِجْلَهُ عَلَى أُسْكُفَّةِ الْبَابِ قَالَ رَسُولُ اللهِ ﷺ «لَوْ تَعْلَمُونَ مَا فِي الْمَسْأَلَةِ مَا مَشَى أَحَدٌ إِلَى أَحَدٍ يَسْأَلُهُ شَيْئًا»