Sunan An-Nasa'i

It was narrated from Ibrahim bin Muhammad Al-Muntashir, from his father, that:He was in the masjid of 'Amr bin Shurahbil and the iqamah for prayer was said, and they were waiting. He came and said: ""I was praying witr."" Abdullah was asked: ""Is there any witr after the adhan?"" He said: ""Yes, and after the Iqamah."" And he narrated that the Prophet (ﷺ) once slept and missed the prayer until the sun had risen, then he prayed