Hazrat Nafi' narrates that Hazrat Abdullah bin Rawahah had a slave girl. He used to hide his intercourse with her from his wife. One day he had intercourse with her, and when he came to his wife, she accused him, saying: "Did you have intercourse with that slave girl?" He denied it, so his wife said to him: "If that is the case, then recite the Qur'an." He then recited these verses: "I bear witness by Allah's command that Muhammad is the Messenger of Allah who is above the heavens. The deeds of Yahya and his father are acceptable in this religion." She said: "You are truthful."