وَ رَوَى عَلِيُّ بْنُ الْحَكَمِ عَنْ سَيْفِ بْنِ عَمِيرَةَ عَنْ مَنْصُورِ بْنِ حَازِمٍ عَنْ أَبِي عَبْدِ اللَّهِ ع قَالَ إِذَا أَوْصَى الرَّجُلُ إِلَى أَخِيهِ وَ هُوَ غَائِبٌ فَلَيْسَ لَهُ أَنْ يَرُدَّ وَصِيَّتَهُ لِأَنَّهُ لَوْ كَانَ شَاهِداً فَأَبَى أَنْ يَقْبَلَهَا طَلَبَ غَيْرَهُ.
English translationBab Ul Qaim Publications
Hadith.5449 - Ali ibn Al-Hakam narrated from Sayf ibn Umayrah from Manṣur ibn Hazim from Abu Abdullah Imam Jafar ibn Muhammad Al-Sadiq (as), who said: "If a man appoints his brother as his executor while he is absent, he does not have the right to reject the will. This is because if he had been present and refused to accept it, the testator would have sought someone else."
Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.