What is the substantiation and refutation of the fabrications of the innovators regarding the incident of Al-Qirtas (the Calamity of Thursday) and what transpired therein, especially the stance of Omar ibn Al-Khattab concerning it, as reported in Sahih Al-Bukhari from Ibn Abbas?

The story mentioned in the Two Sahihs (Bukhari and Muslim) about the Prophet, peace and blessings be upon him, requesting to write a document after which the Ummah would never go astray, and Umar, may Allah be pleased with him, saying: "The Book of Allah is sufficient for us," does not provide an argument for the people of innovation (Ahl al-Bidah) against Umar, may Allah be pleased with him. Rather, this is counted among his virtues and his deep understanding (fiqh), as he feared that the Prophet, peace and blessings be upon him, might write things that would be difficult for the Companions. And the opinion of not writing was not Umar's alone; rather, a group of Companions agreed with him out of eagerness and compassion for the Prophet, peace and blessings be upon him, during his illness.

The Prophet's, peace and blessings be upon him, statement requesting the writing was not obligatory; the proof of this is that he did not reiterate his command to them after their disagreement. Furthermore, the Prophet, peace and blessings be upon him, is infallible in his health and illness, so there is nothing in his words that could be mistaken. As for some of them saying, "Has he perhaps been delirious?" (A hajara?), this was not directed at Umar; rather, it was said by those who disagreed with Umar's opinion, as a denunciation of those who hesitated to obey the Prophet's command, peace and blessings be upon him.