The Messenger of Allah ﷺ said, "Ibn Maktum calls the adhan at night, so eat and drink until Bilal calls the adhan, for Bilal does not call it until he sees the dawn."
أن رسول الله ﷺ قال: إن ابن مكتوم يؤذن بليل فكلوا واشربوا، حتى يؤذن بلال، فإن بلالا لا يؤذن حتى يرى الفجر.
Ibn Khuzayma (406) narrated it through Abdul-Aziz, meaning ibn Muhammad, Darawardi, from Hisham bin Urwa, from his father, from Ayesha, as I have already mentioned.Ibn Khuzayma said, "This is a sahih report in terms of transmission, and it does not contradict the report of Salim from Ibn Umar, or the report of Qasim from Ayesha, since it is possible that the Prophet ﷺ had made the night call to prayer rotate between Bilal and Ibn Umm Maktum. On some nights he would order Bilal to give the call first, at night. When Bilal came down, Ibn Umm Maktum would go up and give the call afterward, in daytime. When it was Ibn Umm Maktum's turn, Ibn Umm Maktum would begin and give the call at night, and when he came down, Bilal would go up and give the call after him, in daytime.The Prophet's ﷺ statement that Bilal gives the call at night applied to the time when it was Bilal's turn to give the night call, and the Prophet's ﷺ statement that Ibn Umm Maktum gives the call at night applied to the time when the turn for the night call belonged to Ibn Umm Maktum. So the Prophet ﷺ taught the people, at both times, that the first of the two calls was a night call, not a day call, and that it did not prevent one who intended to fast from eating or drinking, while the second call did prevent eating and drinking, since it was a day call, not a night call." End of quote.Ibn Hajar said, "Diya and others criticized this view, and it was said that it was not a rotation at all, but rather that the two of them had two different situations. At first, when the call to prayer was instituted, Bilal used to give it alone, and he would not give the call for dawn prayer until Fajr had broken... Then Ibn Umm Maktum was added to assist him, and he used to give the call at night, while Bilal continued in his original practice. The report of Unaysa and others is to be understood in this light. Then, in the end, Ibn Umm Maktum was set aside because of his frailty, and someone else was appointed to watch for Fajr on his behalf, and Bilal's call at night became the settled practice." Fath al-Bari (2/103).As for what Abu Ishaq narrated from Aswad bin Yazid, from Ayesha, who said that the Messenger of Allah said, "When Amr gives the call, eat and drink, for he is a blind man, but when Bilal gives the call, withdraw your hands, for Bilal does not give the call until dawn has broken."Ibn Khuzayma (407) narrated it from Ahmad bin Mansur Ramadi, who said, Abu Mundhir told us, Yunus told us, from Abu Ishaq, with this wording. Ibn Khuzayma said, "I have not found evidence that Abu Ishaq heard this report directly from Aswad." I say, this is because Abu Ishaq was known to conceal defects in his chains of transmission, so an explicit statement of direct hearing is required.