Sahih Bukhari
Sahih Bukhari Volume 006, Book 060, Hadith Number 041.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 60. Prophetic Commentary on the Qur'an (Tafseer of The Prophet (PBUH))
Narrated By 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)."