Satan threatens you with the prospect of poverty and bids you to be niggardly, whereas God promises you His forgiveness and bounty; and God is infinite, all-knowing,
Al-Baqara (The Cow) Verse 268
The Prophet said, "None of you will have faith till he wishes for his (Muslim) brother what he likes for himself."
Sahih Bukhari: Volume 1, Book 2, Number 12