Musnad Ahmad 30:1260

Abu al-Nadr narrated to us, Warqa’ ibn ‘Umar al-Yashkuri narrated to us, he said: I heard ‘Amr ibn Dinar narrating from ‘Ata’ ibn Yasar, from Abu Hurayrah, he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "There is no prayer after the Iqamah except the prescribed one."