Musannaf Ibn Abi Shayba 4:74

Affan narrated to us, Shu'bah narrated to us, from Khubayb (Habib) ibn Abd al-Rahman, who said: I heard my paternal aunt say—and she had performed Hajj with the Prophet, peace and blessings of Allah be upon him—she said: The Messenger of Allah, peace and blessings of Allah be upon him, used to say: "Ibn Umm Maktum calls out at night, so eat and drink until Bilal calls out." And: "Bilal calls the Adhan at night, so eat and drink until Ibn Umm Maktum calls out." She said: One would ascend and the other would descend. We would hold onto him and say, "Stay as you are until we finish our Suhur."