|The place to be wiped on a sock||
Islamic law prescribes that the top of the sock is to be wiped.
Said al-Mughirah, "I saw the Messenger of Allah, upon whom be peace, wipe over the top of his socks." (Related by Ahmad, Abu Dawud and at-Tirmidhi, who called it hassan.) 'Ali observed, "If the religion was based on opinion, the bottom of the sock would take preference in being wiped to the top of the sock." (Related by Abu Dawud and ad-Daraqutni with a hassan or sahih chain.) What is obligatory in the wiping is what is meant by the lexicographical meaning of the word "wipe." There are no specifications authentically mentioned with respect to the wiping.
|The duration of the wiping||
For the resident, this period is one day and night. For the traveller, it is three days and nights. Said Safwan ibn 'Assal, "We were ordered (by the Prophet) to wipe over the socks if we were in a state of purity when we put them on, for three days if we were travellers, and for one day and night if we were residents. We did not remove them unless we were in post-sex impurity." (Related by ash-Shaf~i, Ahmad, Ibn Khuzaimah, at-Tirmidhi, and an-Nasa'i, who graded it sahih.)
Shuraih ibn Hani said, "I asked 'Aishah about wiping over socks and she answered, 'For the traveller, three days and three nights; for the resident, one day and night." This hadith is related by Ahmad, Muslim, at-Tirmidhi, an-Nasa'i and Ibn Majah. Of its authenticity, al-Baihaqi says, "This is the most authentic report on this topic." Some say that the duration begins with the time of the wiping, while others say it begins from the time of nullifying the ablution after wearing the socks.
|The description of the wiping||
After the person completes his ablution and puts on his socks or slippers, it is proper for him to wipe over them later on when he wants to perform ablution. He is permitted to do that for one day and night if he is resident, and for three days and nights if he is a traveller. But if he is in post-sex impurity, he must remove his socks, in accordance with the preceding hadith of Safwan.