Al-Kāfi - Volume 7 > Another Chapter
Hadith #4

4- عَنْهُ عَنْ عَلِيِّ بْنِ عُقْبَةَ عَنْ أَبِيهِ قَالَ سَأَلْتُ أَبَا عَبْدِ اللهِ (عَلَيْهِ السَّلام) عَنْ رَجُلٍ أَوْصَى لِرَجُلٍ بِصُنْدُوقٍ وَكَانَ فِي الصُّنْدُوقِ مَالٌ فَقَالَ الْوَرَثَةُ إِنَّمَا لَكَ الصُّنْدُوقُ وَلَيْسَ لَكَ مَا فِيهِ فَقَالَ الصُّنْدُوقُ بِمَا فِيهِ لَهُ.

4. It is narrated from the narrator of the previous Hadith from Ali ibn ‘Uqbah from his father who has narrated the following: “I once asked abu ‘Abd Allah, ‘Alayhi al-Salam, about the case of a man who makes a will about a box with assets in it for a man. The heirs say that only the box belongs to him and not its contents. He (the Imam) said, ‘The box and its contents belong to him.”’