Shahib bin Bashir narrated from Anas bin Malik that the Messenger of Allah (s.a.w) said:
"All expenditures are in Allah's Cause, except for buildings, for there is no good in it." (IT)
English reference (IT): Vol. 4, Book 11, Hadith 2482 (IT)
Arabic reference (IT): Book 37, Hadith 2670 (IT)