4. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ibn Abi ‘Umayr from ibn Bukayr and Jamil from ‘Amr ibn Mu‘ab who has said that I heard abu ‘Abdallah عليه السلام 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 the Messenger of Allah to a man and then to next man. Until the Imam (abu ‘Abdallah عليه السلام ended up to his self.” The Imam عليه السلام six times said, “To the next man.” 1. The case with David and Solomon عليه السلام is referred to in the Holy Quran (21:78 – 79) .