Musannaf Ibn Abi Shayba 16:892

Abu Bakr narrated to us, he said: Hatim ibn Isma'il narrated to us, from Ja'far, from his father, who said: There was on the ring of al-Husayn and al-Hasan: "Mention Allah." Ja'far said: There was on the ring of my father: "The might belongs to Allah, all of it."