Sahih Bukhari Volume 2, Book 24, Hadith Number 497.

Narated By Abu Masud Al-Ansar : Whenever Allah’s Apostle (p.b.u.h) ordered us to give in charity, we used to go to the market and work as porters and get a Mudd (a special measure of grain) and then give it in charity. (Those were the days of poverty) and to-day some of us have one hundred thousand.