From the route of an-Nawwas bin Sam^an, may Allah accept his deeds, who said,
The Prophet, sallallahu ^alayhi wa sallam, said: << Good manners are the foundation for philanthropy, and the sinful matter is the matter which wavers inside of you and hate that it would be exposed to the people.>>
Narrated by Muslim.
From the route of Wabisah bin Ma^bad, may Allah accept his deeds, who said: I went to the Messenger of Allah, sallallahu ^alayhi wa sallam, and the Prophet said:
<<Have you come to inquire about philanthropy?>> I said: Yes. He said: << Look inside your heart for a valid sign. Philanthropy is the set of matters ones soul and heart feel comfortable with. Sinning is what burdens oneself and wavers in the chest, even if people attempt to justify for you and give you an edict about it.>>
This Hadith is Hasan and is narrated in the Musnads of Imams Ahmad bin Hanbal and ad-Darimiyy with a Hasan chain of narration.