“This is about the case of a man who has a slave-girl and his wife gives him trouble about her. Thus, he says, ‘She is charity for you.’ One of the two Imam, (abu Ja‘far or abu ‘Abd Allah), ‘Alayhim al- Salam, has said, ‘If he has done so for the sake of Allah, most Majestic, most Glorious, he must comply with what he has said, but if he did not say it for the sake of Allah, he can reverse his decision.’”