Al-Kāfi
Hadith 747 6ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ أَبِي يَحْيَى الْوَاسِطِيِّ عَنْ هِشَامِ بْنِ سَالِمٍ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلام) قَالَ إِنَّ الامْرَ فِي الْكَبِيرِ مَا لَمْ تَكُنْ فِيهِ عَاهَةٌ.
6. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from abu Yahya al-Wasiti from Hisham ibn Salim from abu ‘Abdallah (a.s.) who has said the following. “The leadership is with being the elder as long as he is free of defects.”