It was narrated from Muhammad bin Sa'd, from his father Sa'd bin Malik, that the Prophet (ﷺ) came to him when he was sick and he said:

"I do not have any children apart from one daughter. Shall I bequeath all my wealth?" The Prophet (ﷺ) said: "No." He said: "Shall I bequeath half of it?" The Prophet (ﷺ) said: "No." He said: "Shall I bequeath one-third of it?" He said: "One-third, and one-third is much or large."

أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، قَالَ حَدَّثَنَا حَجَّاجُ بْنُ الْمِنْهَالِ، قَالَ حَدَّثَنَا هَمَّامٌ، عَنْ قَتَادَةَ، عَنْ يُونُسَ بْنِ جُبَيْرٍ، عَنْ مُحَمَّدِ بْنِ سَعْدٍ، عَنْ أَبِيهِ، سَعْدِ بْنِ مَالِكٍ أَنَّ النَّبِيَّ صلى الله عليه وسلم جَاءَهُ وَهُوَ مَرِيضٌ فَقَالَ إِنَّهُ لَيْسَ لِي وَلَدٌ إِلاَّ ابْنَةٌ وَاحِدَةٌ فَأُوصِي بِمَالِي كُلِّهِ قَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ لاَ ‏"‏‏.‏ قَالَ فَأُوصِي بِنِصْفِهِ قَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ لاَ ‏"‏‏.‏ قَالَ فَأُوصِي بِثُلُثِهِ قَالَ ‏"‏ الثُّلُثَ وَالثُّلُثُ كَثِيرٌ ‏"‏‏.‏