It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Indeed, Bilal gives the call to prayer at night, so continue eating and drinking until Ibn Umm Maktum gives the call to prayer.
Hadith Referenceالفتح الربانی / كتاب الصلاة / 1300