To abstain from being generous is tantamount to having bad thoughts about the One Who is worshiped.

—Muhammad b. ‘Ibad Al-Mahlabi on giving in charity

Allah (SWT) says:
‘And whatsoever you spend of anything (in Allah’s cause), He will replace it.  And He is the Best of providers.’ (Qur’an 34:39)

(Read on pg 105, Abdul-Malik Mujahid, Gems and Jewels: Wise Sayings, Interesting Events & moral Lessons from the Islamic History. Darussalam. Riyadh:2003.)