Ibn Abd Khair narrates from his father: I saw Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) wiping over the upper part of the foot, and he was saying: If I had not seen the Prophet Muhammad (peace and blessings be upon him) wiping over the upper part, I would have thought that the lower part is more deserving of being wiped over.
Imam Humaydi (may Allah have mercy on him) states: If this incident is regarding wiping over leather socks (khuffs), then it is Sunnah, and if it is other than the leather socks, then this ruling is "abrogated."
Hadith Referenceمسند الحميدي / 47
Hadith Gradingمحدثین:إسناده
Hadith Takhrij« إسناده صحيح، وأخرجه أحمد 95/1، عبداللہ ابنه فى الزوائد المسنده 114/1 وابوداود 162، 163، 164، أبو يعلى الموصلي فى ”مسنده“: 287/1-455، برقم : 346، 613، والدارقطني 199/1 برقم: 23، 24، وابن حزم فى المحلي: 111/2 ، والبيهقي : 292/1»