Yahya related to me from Malik from Nafi from Abdullah ibn Umarthat Hafsa, the wife of the Prophet, may Allah bless him and grant himpeace, told him that the Messenger of Allah, may Allah bless him andgrant him peace, used to pray two quick rakas when the muadhdhin hadfinished the adhan for the subh prayer, before the iqama was said forthe prayer.
App reference: Book 7, Hadith 29
USC-MSA web (English) reference: Book 7, Hadith 29
Arabic reference: Book 7, Hadith 283