and the wicked. The Rāfidah charge many of them with disbelief and wickedness (1). Among them are members of Ahl al-Sunnah who are loyal (2) to Abū Bakr and Umar, such as Zayd ibn Ali ibn al-Husayn and others like him from the descendants of Fātimah [- may Allah be pleased with her -] (3). Indeed, the Rāfidah rejected Zayd ibn Ali ibn al-Husayn and those who supported him, declaring them (4) to be disbelievers and wicked. In fact, whether out of ignorance or obstinacy, the Rāfidah are the fiercest of all people in their enmity toward the descendants of Fātimah—may Allah be pleased with her.
Moreover, Ali ibn Mūsā’s admonition to his aforementioned brother demonstrates that among Fātimah’s descendants are the obedient and the disobedient (5), and that they attained honor from Allah only by obeying Him. This is a universal principle applying to all creation: whoever obeys Allah is honored by Him, while whoever disobeys Allah deserves to be abased by Him. This is what the Book and the Sunnah establish.
As for his statement that al-Ma’mūn appointed him to the caliphate, this is correct. However, [that] did not come to fruition; [rather,] the matter remained thus until Ali ibn Mūsā died (6), and he did not appoint him as his heir apparent (7). They allege that he killed him with poison. Accordingly, if al-Ma’mūn’s first action