(14) باب فَضْلِ النَّفَقَةِ وَالصَّدَقَةِ عَلَى الْأَقْرَبِينَ وَالزَّوْجِ وَالْأَوْلَادِ وَالْوَالِدَيْنِ وَلَوْ كَانُوا مُشْرِكِينَ
Abu Mas'ud reported Allah's Messenger (way peace be upon him) as saying:
When a Muslim spends on his family seeking reward for it from Allah, it counts for him as sadaqa.
Reference: Sahih Muslim 1002 a
In-book reference: Book 12, Hadith 59
USC-MSA web (English) reference(deprecated numbering scheme): Book 5, Hadith 2192