The historians differ on the date of the death of the Mahdi. While Ibn Khaldun mentions that he died in the year 524 AH / 1130 AD, all other historians agree that he died in the year 522 AH / 1128 AD. After comparing the accounts, it appears that his death occurred on Wednesday, the thirteenth of Ramadan of that year. A number of historians have pointed out that this death was not announced when it occurred, but remained a secret. Ibn al-Qattan mentioned that "When he passed away, may God be pleased with him, his companions concealed his death, and only those in the house who were previously designated knew of it, namely his servants, his sister, and his brother. This concealment continued... his sister concealed it from her husband and the senior companions. Matters were managed in his name until the year 529 AH." When the Mahdi's illness intensified, he felt his end approaching and began to indicate this to his close associates, asking them to seek his counsel on whatever they deemed fit. They began to seek his counsel on several matters, and he answered them, concluding with his saying: "I tell you, as the Messenger of God said: Do not hate each other, do not envy each other, do not turn your backs on each other, and be brothers, O servants of God." He then said, "Have I delivered the message?" They replied, "Yes." On his last day, he wanted to bid his followers a final farewell and impart his advice. Their souls were overcome with tears. He rode his mule, accompanied by two of his companions, and ordered that the men be gathered so that they could hear his words and his farewell to his companions. Ibn Khaldun, Al-Ibar: 74. Al-Marrakshi, Al-Mu'jib: 74. Ibn al-Qattan, Nuzm al-Juman: 79. See: Al-Baydaq, Akhbar al-Mahdi: 75. Ibn Khallikan, Wafayat al-A'yan: 93. Ibn al-Qattan, Nuzm al-Juman: 77. See: Al-Baydaq, Akhbar al-Mahdi: 449. However, Al-Baydaq narrates an account suggesting the concealment lasted only three years. See: Al-Baydaq, Akhbar al-Mahdi: 79. This hadith is part of a hadith narrated by Bukhari in the Book of Etiquette, in the chapter on what is forbidden regarding envy and turning away from each other.