Al-Kāfi - Volume 7 > The Matters for which one can Make a Will and what is Preferable in the Issue
Hadith #3

3- عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنْ حَمَّادِ بْنِ عِيسَى عَنْ شُعَيْبِ بْنِ يَعْقُوبَ قَالَ سَأَلْتُ أَبَا عَبْدِ اللهِ (عَلَيْهِ السَّلام) عَنِ الرَّجُلِ يَمُوتُ مَا لَهُ مِنْ مَالِهِ فَقَالَ لَهُ ثُلُثُ مَالِهِ وَلِلْمَرْأَةِ أَيْضاً.

3. A number of our people have narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from Hammad ibn ‘Isa from Shu’ayb from Ya’qub who has narrated the following: “I once asked abu ‘Abd Allah, ‘Alayhi al-Salam, about the case of a man who dies and about what is for him from his legacy. He (the Imam) said, ‘One third of his legacy is for him and this applies to a woman also.’”