I went out with Adi ibn Adi al-Kindi till we came to Mecca. He sent me to Safiyyah daughter of Shaybah who remembered a tradition (that she had heard) from Aisha. She said: I heard Aisha say: I heard the Messenger of Allah ﷺ say: There is no divorce or emancipation in case of constraint or duress (ghalaq). Abu Dawud said: I think ghalaq means anger.  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ لاَ طَلاَقَ وَلاَ عَتَاقَ فِي غَلاَقٍ