Narrated Abu Wail:
Hudhaifa said, "The Verse:-- "And spend (of your wealth) in the Cause of Allah and do not throw yourselves in destruction," (2.195) was revealed concerning spending in Allah's Cause (i.e. Jihad).
USC-MSA web (English) reference: Vol. 6, Book 60, Hadith 41
Arabic reference: Book 65, Hadith 4516