The Prophet ﷺ said, "When a Muslim spends something on his family intending to receive Allah's reward it is regarded as Sadaqa for him."  

عَنِ النَّبِيِّ فَقَالَ عَنِ النَّبِيِّ ﷺ قَالَ إِذَا أَنْفَقَ الْمُسْلِمُ نَفَقَةً عَلَى أَهْلِهِ وَهْوَ يَحْتَسِبُهَا كَانَتْ لَهُ صَدَقَةً  

Messenger of Allah ﷺ said, "Allah said, 'O son of Adam! Spend, and I shall spend on you."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ قَالَ اللَّهُ أَنْفِقْ يَا ابْنَ آدَمَ أُنْفِقْ عَلَيْكَ  

The Prophet ﷺ said, "The one who looks after a widow or a poor person is like a Mujahid (warrior) who fights for Allah's Cause, or like him who performs prayers all the night and fasts all the day."  

قَالَ النَّبِيُّ ﷺ السَّاعِي عَلَى الأَرْمَلَةِ وَالْمِسْكِينِ كَالْمُجَاهِدِ فِي سَبِيلِ اللَّهِ أَوِ الْقَائِمِ اللَّيْلَ الصَّائِمِ النَّهَارَ  

The Prophet ﷺ visited me at Mecca while I was ill. I said (to him), "I have property; May I bequeath all my property in Allah's Cause?" He said, "No." I said, "Half of it?" He said, "No." I said, "One third of it?" He said, "One-third (is alright), yet it is still too much, for you'd better leave your inheritors wealthy than leave them poor, begging of others. Whatever you spend will be considered a Sadaqa for you, even the mouthful of food you put in the mouth of your wife. Anyhow Allah may let you recover, so that some people may benefit by you and others be harmed by you."  

كَانَ النَّبِيُّ ﷺ يَعُودُنِي وَأَنَا مَرِيضٌ بِمَكَّةَ فَقُلْتُ لِي مَالٌ أُوصِي بِمَالِي كُلِّهِ قَالَ لاَ قُلْتُ فَالشَّطْرُ قَالَ لاَ قُلْتُ فَالثُّلُثُ قَالَ الثُّلُثُ وَالثُّلُثُ كَثِيرٌ أَنْ تَدَعَ وَرَثَتَكَ أَغْنِيَاءَ خَيْرٌ مِنْ أَنْ تَدَعَهُمْ عَالَةً يَتَكَفَّفُونَ النَّاسَ فِي أَيْدِيهِمْ وَمَهْمَا أَنْفَقْتَ فَهُوَ لَكَ صَدَقَةٌ حَتَّى اللُّقْمَةَ تَرْفَعُهَا فِي فِي امْرَأَتِكَ وَلَعَلَّ اللَّهَ يَرْفَعُكَ يَنْتَفِعُ بِكَ نَاسٌ وَيُضَرُّ بِكَ آخَرُونَ