"‏ مَا آتَاكَ اللَّهُ عَزَّ وَجَلَّ مِنْ هَذَا الْمَالِ مِنْ غَيْرِ مَسْأَلَةٍ وَلاَ إِشْرَافٍ فَخُذْهُ فَتَمَوَّلْهُ أَوْ تَصَدَّقْ بِهِ وَمَا لاَ فَلاَ تُتْبِعْهُ نَفْسَكَ ‏"

"I heard that you have been doing some work for the Muslims, and you are given payment for that, but you do not accept it. "I said: "Yes (that is so); I have horses and slaves and am well-off, and I wanted my work to be an act of charity toward the Muslims." 'Umar, may Allah be pleased with him, said: "I wanted the same thing as you. The Prophet used to give me money, and I would say: 'Give it to someone who is more in need of it than I am. Once he gave me money and I said: 'Give it to someone who us more in need of it that I am, and he said: 'Whatever Allah, the Mighty and Sublime, gives you of this wealth without you asking for it or hoping or it, take it and keep it, or give it in charity, and whatever. He does not give you then do not hope for it or wish for it."'