I heard Abu ‘Abdallah (a.s.) say the following: “Do you think that a testator of us chooses whoever he wants as the executor of his will? No, I swear by Allah, it is not so. It is a covenant from Allah and His Messenger to a man and then to the next man until the matter is delivered to its rightful owner.” Al-Husayn ibn Muhammad has narrated from Mu‘alla ibn Muhammad from Muhammad ibn Jumhur from Hammad ibn ‘Isa from Minhal from ‘Amr ibn al-Ash‘ath from Abu ‘Abdallah (a.s.) a similar hadith.