The job of a caller to prayer is to raise his voice loudly with the words of the prayer call to inform people about the prayer time. A blind person can do so if he has someone telling him about the its time. In this hadith, Aisha, the Mother of the Believers, narrated that Abdullah ibn Umm Maktoum, his name is Abdullah ibn Qais ibn Za'ida Al-Qurashi and he is the cousin of Khadija, the Mother of the Believers, was a blind man whose job was to call people to prayer. The Prophet (ﷺ) assigned Bilal ibn Rabah to call to prayer along with Abdullah for the following cause. When the Companions secluded and prayed at night in Ramadan in the Prophetic mosque, they were surprised by the call to Fajr (Dawn) prayer before taking a rest and having suhour meal as a preparation to fast. Some may have dozed off before bathing due to intercourse. As a result, the Prophet (ﷺ) decided that Bilal called to Fajr prayer before its time to alert those praying or sleeping. At Fajr time, Bilal descended from the place of call then Abdullah ascended to call to prayer so that people refrained from eating suhour and prepared themselves for Fajr prayer. This is explained by the narration of the two Sahihs in which Abdullah ibn Omar narrated that the Prophet (ﷺ) said, "Verily, Bilal calls to prayer at night, so you can keep eating (suhour) and drinking until Ibn Um Maktoum calls." Finally, this hadith contains the following benefits: (1) A blind man’s call to prayer is valid on condition that he has someone telling him about its time, (2) It confirms the legitimacy of a man’s lineage to his mother as long as it becomes famous and there is a need for it, (3) It refers to the legitimacy of describing a person with a flaw for the purpose of definition or other benefits, not to belittle him, and (4) It shows the legitimacy of appointing two callers to prayer in one mosque..