Sunan an Nasai
2542
Sahih+2

It was narrated that Abu Hurairah said:"A man said: 'O Messenger of Allah, which kind of charity is best? He said: 'Giving charity when you are in good health, and feeling stingy, hoping for a long life and fearing poverty

SahihAbu Ghuddah
SahihAl-Albani