قَدْ فَرَضَ اللَّهُ لَكُمْ تَحِلَّةَ أَيْمَانِكُمْ ۚ وَاللَّهُ مَوْلَاكُمْ ۖ وَهُوَ الْعَلِيمُ الْحَكِيمُ
“Allah has already ordained for you [Muslims] the dissolution of your oaths. And Allah is your Protector, and He is the Knowing, the Wise.”
This ayah, on the dissolution of oaths, is part of Surat al-Tahrim's response to the Prophet ﷺ swearing off Maria RA to placate Hafsa RA, described at this event.