Sa’d reported: The Prophet, peace and blessings be upon him, visited me while I was ill in Mecca. I said, “I have some wealth. May I donate all of it?” The Prophet said, “No.” I said, “Half of it?” The Prophet said, “No.” I said, “A third of it?” The Prophet said, “Yes a third, but this is still too much. That you leave your inheritors wealthy is better than leaving them dependent, begging for what people have. Whatever you spend on them is charity for you, even the morsel you feed to your wife.”
Source: Ṣaḥīḥ al-Bukhārī 5039
Grade: Sahih (authentic) according to Al-Bukhari
عَنْ سَعْدٍ رَضِيَ اللَّهُ عَنْهُ قَالَ كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَعُودُنِي وَأَنَا مَرِيضٌ بِمَكَّةَ فَقُلْتُ لِي مَالٌ أُوصِي بِمَالِي كُلِّهِ قَالَ لَا قُلْتُ فَالشَّطْرِ قَالَ لَا قُلْتُ فَالثُّلُثِ 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
5039 صحيح البخاري كتاب النفقات باب فضل النفقة على الأهل