6. Muhammad ibn al-Hasan ibn Ahmad ibn al-Walid (may Allah be pleased with him) said: Muhammad ibn al-Husayn al-Saffar said on the authority of Ubbad ibn Sulayman, on the authority of Sa`d ibn Sa`d that
I asked Abu al-Hasan (`Ali) al-Rida (AS) about Divine Unity. He responded: “It is what you already follow.”