BAYHAQI 2014:
from Ibn ʿUmar —
[Machine] The Messenger of Allah, ﷺ , had two mu'adhins (callers to prayer), Bilal and Ibn Umm Maktum, the blind. The Messenger of Allah, ﷺ , said, "Indeed, Bilal calls the adhan at night, so eat and drink until Ibn Umm Maktum calls the adhan." There was nothing between them except the time for one to descend and the other to ascend the minaret. And with this chain of narration, from Ubaid Allah, from Al-Qasim, from Aisha, from the Prophet, ﷺ , the statement is similar.
البيهقي ٢٠١٤:
عن ابن عمر —
كَانَ لِرَسُولِ اللهِ ﷺ مُؤَذِّنَانِ بِلَالٌ وَابْنُ أُمِّ مَكْتُومٍ الْأَعْمَى فَقَالَ رَسُولُ اللهِ ﷺ إِنَّ بِلَالًا يُؤَذِّنُ بِلَيْلٍ فَكُلُوا وَاشْرَبُوا حَتَّى يُؤَذِّنَ ابْنُ أُمِّ مَكْتُومٍ وَلَمْ يَكُنْ بَيْنَهُمَا إِلَّا أَنْ يَنْزِلَ هَذَا وَيَرْقَى هَذَا 2015 وَبِهَذَا الْإِسْنَادِ عَنْ عُبَيْدِ اللهِ عَنِ الْقَاسِمِ عَنْ عَائِشَةَ عَنِ النَّبِيِّ ﷺ مِثْلَهُ
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