Muhammad ibn Hatim narrated to us, Muhammad ibn Bakr informed us, Ibn Jurayj informed us — and (another chain) Ishaq ibn Mansur narrated to me, and the wording is his — he said: Abd al-Razzaq informed us, Ibn Jurayj informed us, Amr ibn Dinar informed me that Abu Ma'bad, the freed slave of Ibn Abbas, informed him that Ibn Abbas informed him that raising the voice with remembrance (dhikr) when the people finished the obligatory prayer was done at the time of the Prophet, peace and blessings be upon him. And he said: Ibn Abbas said, "I used to know when they had finished by that, when I heard it."