"I undertook a financial responsibility. [1] Then I came to the Prophet and asked him (for help) concerning that. He said: 'Asking (for money) is not permissible except for three: A man who undertakes a financial responsibility between people; he may ask for help with that until the matter is settled, then he should refrain (from asking)."' (Using translation from Nasāʾī 2579)  

تَحَمَّلْتُ حَمَالَةً فَأَتَيْتُ النَّبِيَّ ﷺ فَسَأَلْتُهُ فِيهَا قَالَ إِنَّ الْمَسْأَلَةَ لَا تَحِلُّ إِلَّا لِثَلَاثَةٍ رَجُلٍ تَحَمَّلَ بِحَمَالَةٍ بَيْنَ قَوْمٍ فَيَسَأَلُ فِيهَا حَتَّى يُؤَدِّيَهَا ثُمَّ يُمْسِكَ  

I was under debt and I came to the Messenger of Allah ﷺ and begged from him regarding it. He said: Wait till we receive Sadaqa, so that we order that to be given to you. He again said: Qabisa, begging is not permissible but for one of the three (classes) of persons: one who has incurred debt, for him begging is permissible till he pays that off, after which he must stop it; a man whose property has been destroyed by a calamity which has smitten him, for him begging is permissible till he gets what will support life, or will provide him reasonable subsistence; and a person who has been smitten by poverty. the genuineness of which is confirmed by three intelligent members of this peoples for him begging is permissible till he gets what will support him, or will provide him subsistence. Qabisa, besides these three (every other reason) for begging is forbidden, and one who engages in such consumes that what is forbidden. (Using translation from Muslim 1044)  

تَحَمَّلْتُ حَمَالَةً فَأَتَيْتُ رَسُولَ اللهِ ﷺ أَسْأَلُهُ فِيهَا فَقَالَ «أَقِمْ يَا قَبِيصَةُ حَتَّى تَأْتِيَنَا الصَّدَقَةُ فَنَأْمُرَ لَكَ بِهَا» قَالَ ثُمَّ قَالَ رَسُولُ اللهِ ﷺ يَا قَبِيصَةُ إِنَّ الصَّدَقَةَ لَا تَحِلُّ إِلَّا لِأَحَدِ ثَلَاثَةٍ رَجُلٍ تَحَمَّلَ بِحَمَالَةٍ فَحَلَّتْ لَهُ الْمَسْأَلَةُ حَتَّى يُصِيبَ قِوَامًا مِنْ عَيْشٍ أَوْ قَالَ سِدَادًا مِنْ عَيْشٍ وَرَجُلٍ أَصَابَتْهُ فَاقَةٌ حَتَّى يَقُولَ ثَلَاثَةٌ مِنْ ذَوِي الْحِجَا مِنْ قَوْمِهِ قَدْ أَصَابَتْ فُلَانًا فَاقَةٌ فَحَلَّتْ لَهُ الْمَسْأَلَةُ حَتَّى يُصِيبَ قِوَامًا مِنْ عَيْشٍ أَوْ قَالَ سِدَادًا مِنْ عَيْشٍ وَرَجُلٍ أَصَابَتْهُ جَائِحَةٌ فَاجْتَاحَتْ مَالَهُ فَحَلَّتْ لَهُ الْمَسْأَلَةُ حَتَّى يُصِيبَهَا ثُمَّ يُمْسِكَ فَمَا سِوَى هَذَا مِنَ الْمَسْأَلَةِ يَا قَبِيصَةُ سُحْتٌ يَأْكُلُهَا صَاحِبُهَا سُحْتًا