Facsimile · p. 245
When the declaration of the Mahdiya and the pledge of allegiance to it were settled, it was not until 69 years prior. in Al-Sus. It is probable that this reticence on the part of Ibn Tumart was to avoid declaring himself the Mahdi, and to suffice with hinting at it, so that the initiative would come from his companions, indicating that he did not truly believe he was the awaited Mahdi. However, as there was a political interest in attracting followers and solidifying their allegiance, he found it agreeable to have his companions pledge allegiance to him as the Mahdi, supporting it implicitly rather than explicitly, believing in the political expediency rather than a doctrinal conviction.
Then came the followers and lovers after him to solidify the idea of Ibn Tumart's Mahdiya, making it the basis for rational and transmitted proof. This is what Abu Abd al-Rahman ibn Tahir did, writing a treatise he called "Al-Kafiya fi al-Burhan 'ala al-Mahdi" (The Sufficient Proof for the Mahdi). In it, he conducted a hypothetical dialogue between a reassured soul, victorious for the Mahdi, and a soul that incites to evil, skeptical of his cause. Among what he said in it: "The reassured soul said: Let him now look at his descriptions, peace and blessings be upon him, for the Mahdi who was foretold to appear in the end of time. If those descriptions match the Mahdi Abu Abd Allah Muhammad ibn Abd Allah, may God Almighty be pleased with him, then you must submit to the judgment that he is the Mahdi foretold by the Messenger of God, peace and blessings be upon him, and his noble angels." And in this vein, the commentator of Az-Zahrawi repeatedly stated in many places in his commentary, and what he said about it: "This is a description of the one who emerged, against whom the infallible, may God be pleased with him, stood firm, and exposed what they were upon of imitation and opinion. It necessitated that his grandfather, peace be upon him, inform of him that he would fill the earth with justice and equity, after it had been filled with injustice."
From this research, see page 72. that this is Abu Abd al-Rahman Muhammad ibn Abd al-Rahman ibn Ahmad, as Mahmoud Ali Makki preferred (in his verification of "Nathm al-Juman": 73). Ibn Abd al-Rahman ibn Tahir al-Mersawi, one of the scholars of Mersa, who assumed its leadership during the reign of Abd al-Mu'min and died in Marrakesh. See Ibn al-Qattan, "Nathm al-Juman," page 188, Madrid edition, 1977. His biography is also in "Al-Takmila" by Ibn al-Abbar (No. 574, year 1250).
See: Ibn al-Qattan, "Nathm al-Juman," page 74. 245