(11) Business Transactions
كتاب البيوع
(17b) Chapter - Section 2
(17) باب - الفصل الثاني
Mishkat al-Masabih 3024 
Usama b. Zaid reported God’s Messenger as saying, “If one is done a kindness and expresses to his benefactor a desire that God may give him a good reward, he has fully expressed his commendation.” Tirmidhi transmitted it.
وَعَنْ أُسَامَةَ بْنِ زَيْدٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: " مَنْ صُنِعَ إِلَيْهِ مَعْرُوفٌ فَقَالَ لِفَاعِلِهِ: جَزَاكَ اللَّهُ خَيْرًا فَقَدْ أَبْلَغَ فِي الثَّنَاءِ ". رَوَاهُ التِّرْمِذِيّ
 صَحِيح  (الألباني)حكم :
Reference : Mishkat al-Masabih 3024
In-book reference : Book 11, Hadith 258