Abu Kabshah reported: The Messenger of Allah, peace and blessings be upon him, said, “I swear an oath by Allah on three qualities and I will tell you about them, so memorize them: the wealth of a servant is not decreased by charity, a servant is not wronged by oppression and he endures it patiently but that Allah increases him in honor, and no servant opens the door of begging but that Allah opens for him the door of poverty.”
Source: Sunan al-Tirmidhī 2325
Grade: Sahih (authentic) according to Al-Tirmidhi
عن أبي كَبْشَة الْأَنَّمَارِيّ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ ثَلَاثَةٌ أُقْسِمُ عَلَيْهِنَّ وَأُحَدِّثُكُمْ حَدِيثًا فَاحْفَظُوهُ مَا نَقَصَ مَالُ عَبْدٍ مِنْ صَدَقَةٍ وَلَا ظُلِمَ عَبْدٌ مَظْلَمَةً فَصَبَرَ عَلَيْهَا إِلَّا زَادَهُ اللَّهُ عِزًّا وَلَا فَتَحَ عَبْدٌ بَابَ مَسْأَلَةٍ إِلَّا فَتَحَ اللَّهُ عَلَيْهِ بَابَ فَقْرٍ
2325 سنن الترمذي كتاب الزهد باب ما جاء مثل الدنيا مثل أربعة نفر
4/153 المحدث الترمذي خلاصة حكم المحدث حسن صحيح في سنن الترمذي