Abu Mas'ud reported God’s messenger as saying, “When someone spends on his family seeking his reward for it from God, it counts to him as <i>sadaqa</i>.” (Bukhari and Muslim.)

وَعَنْ أَبِي مَسْعُودٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسلم: «إِذا أَنْفَقَ الْمُسْلِمُ نَفَقَةً عَلَى أَهْلِهِ وَهُوَ يَحْتَسِبُهَا كَانَت لَهُ صَدَقَة»