Sayyiduna Uqbah bin Amir al-Juhani (may Allah be pleased with him) said: His sister made a vow that she would go for Hajj on foot and with her head uncovered. I mentioned this to the Prophet (peace and blessings of Allah be upon him), so he said: "Tell your sister to cover her head and ride, and to fast for three days." (i.e., to give expiation for not fulfilling the vow).
Hadith Referenceسنن دارمي / من النذور و الايمان / 2371
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده ضعيف لضعف عبيد الله بن زحر وأبو سعيد الرعيني هو: جعثل بن هاعان. والحديث متفق عليه، [مكتبه الشامله نمبر: 2379]
Hadith Takhrijاس روایت کی سند ضعیف ہے، لیکن حدیث صحیح ہے۔ دیکھئے: [بخاري 1866] ، [مسلم 1644] ، [أبوداؤد 3299] ، [ترمذي 1544] ، [نسائي 3823] ، [ابن ماجه 2134] ، [أبويعلی 1753]