Narrated Abu Huraira:
Allah Apostle said, "If I had gold equal to the mountain of Uhud, it would not please me that anything of it should remain with me after three nights (i.e., I would spend all of it in Allah's...
O Allah send blessings upon him. (This is) that which Allah has willed, there is no power except with Allah.
Info: Ahmad 4/447, Ibn Majah, Malik. Al-Albani graded it authentic in Sahihul-Jami' As-Saghir 1/212. Also see Al-Arna'ut's checking of Ibn Al-Qayyim's Zadul-Ma'ad 4/170.