It was narrated from Abu Hurairah that the Messenger of Allah said:"By the One in Whose hand is my soul, if one of you were to take a rope and gather firewood on his back that would be better for him than coming to a man to whom Allah, the Mighty and Sublime, has given of His bounty and asking him (for help). Which he may or may not give.
أَخْبَرَنَا عَلِيُّ بْنُ شُعَيْبٍ، قَالَ أَنْبَأَنَا مَعْنٌ، قَالَ أَنْبَأَنَا مَالِكٌ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " وَالَّذِي نَفْسِي بِيَدِهِ لأَنْ يَأْخُذَ أَحَدُكُمْ حَبْلَهُ فَيَحْتَطِبَ عَلَى ظَهْرِهِ خَيْرٌ لَهُ مِنْ أَنْ يَأْتِيَ رَجُلاً أَعْطَاهُ اللَّهُ عَزَّ وَجَلَّ مِنْ فَضْلِهِ فَيَسْأَلَهُ أَعْطَاهُ أَوْ مَنَعَهُ " .
Nesai
The Book of Zakah • Hadith 2589