Hazrat Samma reports that the Messenger of Allah (peace be upon him) forbade fasting on Saturday, and he (peace be upon him) said: "If any of you finds only a green twig, then he should break his fast with that." Imam Abu Bakr (may Allah have mercy on him) says that Mu'awiyah bin Salih has differed from Thawr bin Yazid in this chain. Thawr, while narrating, has described Samma as the sister of Abdullah bin Busr, whereas Mu'awiyah has described Hazrat Samma as the sister of Busr and the paternal aunt of Abdullah.