Sahih al-Bukhari 1470
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "By Him in Whose Hand my life is, it is better for anyone of you to take a rope 
and cut the wood (from the forest) and carry it over his back and sell it (as a means of earning his 
living) rather than to ask a person for something and that person may give him or not."
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏
"‏ وَالَّذِي نَفْسِي بِيَدِهِ لأَنْ يَأْخُذَ أَحَدُكُمْ حَبْلَهُ فَيَحْتَطِبَ عَلَى ظَهْرِهِ خَيْرٌ لَهُ مِنْ أَنْ يَأْتِيَ رَجُلاً، فَيَسْأَلَهُ، أَعْطَاهُ أَوْ مَنَعَهُ ‏"‏‏.‏