It was narrated from Sa'd that the Prophet visited him when he was sick, and he said:

"O Messenger of Allah, shall I bequeath all of my wealth?" He said: "No." He said: "Half?" He said: "No." He said: "One-third?" He said: "One-third, and one-third is much or large."

أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا وَكِيعٌ، قَالَ حَدَّثَنَا هِشَامُ بْنُ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ سَعْدٍ، أَنَّ النَّبِيَّ ﷺ عَادَهُ فِي مَرَضِهِ فَقَالَ يَا رَسُولَ اللَّهِ أُوصِي بِمَالِي كُلِّهِ قَالَ " لاَ ". قَالَ فَالشَّطْرَ قَالَ " لاَ ". قَالَ فَالثُّلُثَ قَالَ " الثُّلُثَ وَالثُّلُثُ كَثِيرٌ أَوْ كَبِيرٌ ".