لِلْفُقَرَاۤءِ الَّذِيْنَ اُحْصِرُوْا فِيْ سَبِيْلِ اللّٰهِ لَا يَسْتَطِيْعُوْنَ ضَرْبًا فِى الْاَرْضِۖ يَحْسَبُهُمُ الْجَاهِلُ اَغْنِيَاۤءَ مِنَ التَّعَفُّفِۚ تَعْرِفُهُمْ بِسِيْمٰهُمْۚ لَا يَسْـَٔلُوْنَ النَّاسَ اِلْحَافًا ۗوَمَا تُنْفِقُوْا مِنْ خَيْرٍ فَاِنَّ اللّٰهَ بِهٖ عَلِيْمٌ ࣖ ( البقرة: ٢٧٣ )
Lilfuqaraaa'il lazeena uhsiroo fee sabeelil laahi laa yastatee'oona darban fil ardi yah sabuhumul jaahilu aghniyaaa'a minat ta'affufi ta'rifuhum biseemaahum laa yas'aloonan naasa ilhaafaa; wa maa tunfiqoo min khairin fa innal laaha bihee 'Aleem (al-Baq̈arah 2:273)
[Charity is] for the poor who have been restricted for the cause of Allah, unable to move about in the land. An ignorant [person] would think them self-sufficient because of their restraint, but you will know them by their [characteristic] sign. They do not ask people persistently [or at all]. And whatever you spend of good – indeed, Allah is Knowing of it. (Al-Baqarah  : 273)
1 Mufti Taqi Usmani
(Your charities should be preferably meant) for the needy who are confined in the way of Allah, unable to travel in the land.An ignorant person takes them as free of need because of their abstinence. You know them by their appearance (from begging). They do not beg people importunately, and whatever good thing you spend, Allah is All-Aware of it.