Al-Kāfi
Hadith 335- عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ أَبِي نَصْرٍ عَنِ ابْنِ بُكَيْرٍ عَنْ مُحَمَّدِ بْنِ مُسْلِمٍ عَنْ أَبِي جَعْفَرٍ (عَلَيْهِ السَّلام) قَالَ سَأَلْتُهُ عَنِ الْوَصِيَّةِ لِلْوَارِثِ فَقَالَ تَجُوزُ قَالَ ثُمَّ تَلا هَذِهِ الآيَةَ إِنْ تَرَكَ خَيْراً الْوَصِيَّةُ لِلْوالِدَيْنِ وَالأقْرَبِينَ.
5. A number of our people have narrated from Sahl ibn Ziyad from Ahmad ibn Muhammad from ibn abu Nasr from ibn Bukayr from Muhammad ibn Muslim who has narrated the following: “I once asked abu Ja‘far (a.s.), about making a will for the heir. He (the Imam) said, ‘It is permissible.’ He (the Imam) then recited this verse. ‘If he leaves good things the will is for parents and relatives.’”