Sahih al-Bukhari, Hadith 4006 ⓘ
Narrated Abu Masud Al-Badri: The Prophet said, "A man's spending on his family is a deed of charity."
حَدَّثَنَا مُسْلِمٌ، حَدَّثَنَا شُعْبَةُ، عَنْ عَدِيٍّ، عَنْ عَبْدِ اللَّهِ بْنِ يَزِيدَ، سَمِعَ أَبَا مَسْعُودٍ الْبَدْرِيَّ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " نَفَقَةُ الرَّجُلِ عَلَى أَهْلِهِ صَدَقَةٌ " .
also referenced under: Book 64, Hadith 57 (In-Book) & Volume 5, Book 59, Hadith 343 (USC-MSA)