We will say: He did that in order to advance the purpose he had in hiding his birth and concealing him from the rulers of the time. Had he mentioned his son and addressed his final will to him, he would have breached his sole purpose. He needed the government officials, yeomen of the king and witnesses of the judges to refer to her in order to safeguard his trusts and monies and also to maintain secrecy of existence of his son and to protect his life by not mentioning him. Anyone who thinks that this is the proof of the falsity of the Imamiyah belief, he is not familiar with practices in the world. Imam Sadiq Ja’far Ibn Muhammad did the same when he addressed his final will to five people, the first of whom was the ruler of that time, Mansur. He did not exclusively address his son Musa in order to protect him. He addressed Rabi, the judge of the time, and his concubine Hamida Barbariyya, and he mentioned his son Musa Ibn Ja’far last in order to hide his position and protect his life. He did not mention along with his son Musa any other of his sons. Perhaps it was to exclude the possibility of someone claiming the position of Imamate after him on the basis of his inclusion among addressees of the final will. And had not been Musa prominent and well known amongst his sons, and his position and relationship to him famous, and his scholarship and erudition well established, and had he been unknown, Imam Sadiq would not have mentioned him in his final will and would have sufficed on the others, as did Hasan Ibn Ali, the father of the Master of the Age.