Musannaf Ibn Abi Shayba 33:473

Waki’ narrated to us, he said: Al-A’mash narrated to us, from Jami’ ibn Shaddad, from Al-Aswad ibn Hilal Al-Muharibi, he said: Mu’adh ibn Jabal said: "Sit with us, let us believe for an hour," meaning: let us remember Allah.