Abu Hurayra reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "The believer is guileless and generous while the corrupt is a swindler and miserly."  

قَالَ رَسُولُ اللهِ ﷺ الْمُؤْمِنُ غِرٌّ كَرِيمٌ وَالْفَاجِرُ خَبٌّ لَئِيمٌ