3. Muhammad ibn al-Hasan ibn Ahmad ibn al-Walid said: Sa’d ibn `Abd Allah, on the authority of Ahmad ibn Hilal on the authority of al-Hasan ibn `Ali ibn Fuddal, on the authority of Abu Hamzah that Abi Ja'far (al-Baqir) said: “There is nothing greater in reward than testifying that: 'There is no god but Allah, because nothing equals Allah, the Mighty and High, and nobody shares His Power.'"