The jurists also made a mistake as a result of their use of analogy in prohibiting usury on items other than the six categories that the Messenger, peace be upon him, prohibited usury on. As it came in the hadith of Ubadah ibn al-Samit that the Prophet, peace be upon him, said: "Gold for gold, silver for silver, salt for salt, dates for dates, wheat for wheat, and barley for barley, equal for equal, hand to hand. Whoever gives more or asks for more has engaged in usury." They analogized other items to these categories, attaching them to them in the ruling of prohibition due to their sharing common causes, the estimation of which they differed on, including storage, sustenance, and financial value. And they concluded with this. Ibn Tumart sufficed with mentioning this error without adding clarification or reasoning, as Ibn Hazm did, who, according to his opinion, elaborated extensively on demonstrating the error of this analogy. It is clear from the foregoing that Ibn Tumart rejected analogical reasoning as it is known in jurisprudence, based on conjecture. However, he was not effective in explaining the flaws of this analogy, and his refutation was limited to denying that the Companions used it and mentioning rulings that he considered erroneous without sufficient reasoning for that. It is strange that Al-Mahdi did not benefit from what Ibn Hazm al-Zahiri wrote in his treatise on the refutation of analogy, which is comprehensive, deep, and insightful, as it appears in his book "Al-Ahkam." Ibn Tumart, after this attempt to demolish analogical reasoning, proceeded from the origin to extend the first distinction to a foundation that is not based on a branch of the morning. He said in it that it leads to falling into error. Narrated by Al-Nasa'i in the Book of Sales. See the details of this in "Bidayat al-Mujtahid" by Ibn Rushd and what follows. See: Ibn Tumart, "Risala fi Anna al-Shari'ah la Tathbut bil-'Aql" and what follows. See: Ibn Hazm, "Al-Ahkam" and what follows. And see especially "Al-Muhalla" and what follows.