'Uqbah bin 'Amir told him, that his sister vowed to walk, barefoot and bareheaded, and he mentioned that to the Messenger of Allah ﷺ He said: "Order her to ride and to cover her head, and to fast for three days."
وَأَنَّهُ ذَكَرَ ذَلِكَ لِرَسُولِ اللَّهِ ﷺ فَقَالَ مُرْهَا فَلْتَرْكَبْ وَلْتَخْتَمِرْ وَلْتَصُمْ ثَلاَثَةَ أَيَّامٍ