حَدَّثَنَا مُسَدَّدٌ، قَالَ: حَدَّثَنَا أَبُو عَوَانَةَ، عَنِ الأَعْمَشِ، عَنْ مُجَاهِدٍ، عَنِ ابْنِ عُمَرَ
قَالَ: قَالَ رَسُولُ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنِ اسْتَعَاذَ بِاللَّهِ فَأَعِيذُوهُ، وَمَنْ سَأَلَ بِاللَّهِ فَأَعْطُوهُ، وَمَنْ أَتَى إِلَيْكُمْ مَعْرُوفًا فَكَافِئُوهُ، فَإِنْ لَمْ تَجِدُوا فَادْعُوا لَهُ، حَتَّى يَعْلَمَ أَنْ قَدْ كَافَأْتُمُوهُ»
The Messenger of Allah (sallallahu alayhi wa sallam), may Allah bless him and grant him peace, said, “Anyone who seeks refuge in Allah will find refuge with Him. Anyone who asks from Allah will be receive. Anyone who does a favour should repay it. If you do not find anything, then make supplication for the doer of the favour so that he knows that you have repaid him.”
Al-Adab Al-Mufrad 216, Book 10, Supervision, Hadith 5. 1 min read