Sunan Abi Dawud 1640
Qabisah b. Mukhiriq al-Hilali said :
I became a guarantor for a payment, and I came to Messenger of Allah (May peace be upon him).  He said: Wait till I receive the sadaqah and I shall order it to be given to you.  He then said : Begging, Qabisah, is allowable only to one of three classes: a man who has become a guarantor for a payment to whom begging is allowed till he gets it, after which he must stop (begging); a man who has been stricken by a calamity and it destroys his property to whom begging is allowed till he gets what will support life (or he said, what will provide a reasonable subsistence); and a man who has been smitten by poverty, about whom three intelligent members of his people confirm by saying: So and so has been smitten by poverty, to such a person begging is allowed till be gets what will support life (or he said, what will provide a reasonable subsistence), after which he must stop (begging).  Any other reason for begging, Qabisah, is forbidden, and one who engages in such consumes it as a thing which is forbidden.
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، عَنْ هَارُونَ بْنِ رِيَابٍ، قَالَ حَدَّثَنِي كِنَانَةُ بْنُ نُعَيْمٍ الْعَدَوِيُّ، عَنْ قَبِيصَةَ بْنِ مُخَارِقٍ الْهِلاَلِيِّ، قَالَ تَحَمَّلْتُ حَمَالَةً فَأَتَيْتُ النَّبِيَّ صلى الله عليه وسلم فَقَالَ ‏"‏ أَقِمْ يَا قَبِيصَةُ حَتَّى تَأْتِيَنَا الصَّدَقَةُ فَنَأْمُرَ لَكَ بِهَا ‏"‏ ‏.‏ ثُمَّ قَالَ ‏"‏ يَا قَبِيصَةُ إِنَّ الْمَسْأَلَةَ لاَ تَحِلُّ إِلاَّ لأَحَدِ ثَلاَثَةٍ رَجُلٌ تَحَمَّلَ حَمَالَةً فَحَلَّتْ لَهُ الْمَسْأَلَةُ فَسَأَلَ حَتَّى يُصِيبَهَا ثُمَّ يُمْسِكُ وَرَجُلٌ أَصَابَتْهُ جَائِحَةٌ فَاجْتَاحَتْ مَالَهُ فَحَلَّتْ لَهُ الْمَسْأَلَةُ فَسَأَلَ حَتَّى يُصِيبَ قِوَامًا مِنْ عَيْشٍ ‏"‏ ‏.‏ أَوْ قَالَ ‏"‏ سِدَادًا مِنْ عَيْشٍ ‏"‏ ‏.‏ ‏"‏ وَرَجُلٌ أَصَابَتْهُ فَاقَةٌ حَتَّى يَقُولَ ثَلاَثَةٌ مِنْ ذَوِي الْحِجَا مِنْ قَوْمِهِ قَدْ أَصَابَتْ فُلاَنًا الْفَاقَةُ فَحَلَّتْ لَهُ الْمَسْأَلَةُ فَسَأَلَ حَتَّى يُصِيبَ قِوَامًا مِنْ عَيْشٍ - أَوْ سِدَادًا مِنْ عَيْشٍ - ثُمَّ يُمْسِكُ وَمَا سِوَاهُنَّ مِنَ الْمَسْأَلَةِ يَا قَبِيصَةُ سُحْتٌ يَأْكُلُهَا صَاحِبُهَا سُحْتًا ‏"‏ ‏.‏