Mishkat al-Masabih 15 Oaths and Vows كتاب الإيمان والنذور 36

وَعَنْ عَبْدِ اللَّهِ بْنِ مَالِكٍ أَنَّ عُقْبَةَ بن عَامر سَأَلَ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَنْ أُخْتٍ لَهُ نَذَرَتْ أَنْ تَحُجَّ حَافِيَةً غَيْرَ مُخْتَمِرَةٍ فَقَالَ: «مُرُوهَا فَلْتَخْتَمِرْ وَلْتَرْكَبْ وَلْتَصُمْ ثَلَاثَةَ أَيَّامٍ» . رَوَاهُ أَبُو دَاوُدَ وَالتِّرْمِذِيُّ وَالنَّسَائِيُّ وَابْنُ مَاجَهْ والدارمي

‘Abdallah b. Malik told that when ‘Uqba b. ‘Amir consulted the Prophet about a sister of his who had vowed to perform the Pilgrimage. If barefoot and bareheaded, he said, “Command her to cover her head and to ride, and to fast three days.” Abu Dawud, Tirmidhi, Nasa’i, Ibn Majah and Darimi transmitted it.