Ahadith

Giving in charity as much as one can afford

Narrated by Asma bint Abu Bakr(Radhiallaho anha): 
Allah's Messenger (sallallaahu 'alaihi wasallam) said "Do not shut 
your money bag; otherwise Allah too will withhold His blessings from  you. Spend (in Allah's cause) as much as you can afford. " 
 
Sahih Al Bukhari Vol 2 Number 515

 

A pagan giving charity and then embraces Islam

 

Narrated by Hakim bin Hizam(Radhiallaho anho): 
I said to Allah's Messenger (sallallaahu 'alaihi wasallam), "Before 
embracing Islam I used to do good deeds like giving in charity, 
slave-manumitting, and the keeping of good relations with kith and 
kin. Shall I be rewarded for those deeds?" The Prophet replied, "You 
became Muslim with all those good deeds (without losing their 
reward)." 
 
Sahih Al Bukhari Vol 2 Number 517