Oaths and Vows
Bulugh al-Maram #1572
كتاب الأيمان والنذور
وَلِلْخَمْسَةِ. فَقَالَ: «إِنَّ اَللَّهَ لَا يَصْنَعُ بِشَقَاءِ أُخْتِكَ شَيْئاً, مُرْهَا:, وَلْتَرْكَبْ, وَلْتَصُمْ ثَلَاثَةَ أَيَّامٍ»
Ahmad and al-Arba'a have:
He said, “Verily! Allah, the Most High, will not do anything with the affliction your sister imposes on herself. Command her to cover her head and to ride, and to fast three days.”
وَلِلْخَمْسَةِ. فَقَالَ: "إِنَّ اَللَّهَ لَا يَصْنَعُ بِشَقَاءِ أُخْتِكَ شَيْئاً, مُرْهَا: , وَلْتَرْكَبْ, وَلْتَصُمْ ثَلَاثَةَ أَيَّامٍ"
He said, "Verily! Allah, the Most High, will not do anything with the affliction your sister imposes on herself. Command her to cover her head and to ride, and to fast three days."
— Bulugh al-Maram, Hadith 1572