Musannaf Ibn Abi Shayba 23:55

Waki' narrated to us, he said: Al-A'mash narrated to us, from Jami' ibn Shaddad, from Al-Aswad ibn Hilal al-Muharibi, who said: Mu'adh said to me: "Sit with us so that we may believe for an hour," meaning: "Let us remember Allah."