Musannaf Ibn Abi Shayba 3:4827

Hushaym narrated to us, he said: Husayn narrated to us, from Ibrahim, who said: I had a cough, so I went out for the morning prayer. The mu'adhdhin heard my cough and thought that we had reached the morning, so he performed the iqamah for the prayer. We prayed, then we looked, and behold, the dawn had not yet broken, so we repeated the prayer.