Musannaf Ibn Abi Shayba 3:3089

Zayd ibn Hubab narrated to us, he said: Mu'awiyah ibn Salih narrated to us, he said: Musa ibn Yazid ibn Mawhab Abu 'Abd al-Rahman al-Amluki narrated to us, from Abu Umamah, who said: "I truly hope that the hour which is on Friday is one of these hours: when the caller (mu'adhdhin) gives the call to prayer, or when the Imam is on the pulpit, or at the time of the iqamah."