Narrated Sa'd bin Abi Waqqas: Allah's Apostle said, "You will be rewarded for whatever you spend for Allah's sake even if it were a morsel which you put in your wife's mouth."
Hadith ReferenceSahih Bukhari / The Book of Belief (Faith) / Hadith: 56
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة