Question: What is the ruling regarding the one who wipes over his socks after the [prescribed] period has passed, and thereafter prays (salaah)?
Response: The ruling is that he must repeat the prayer, because [the prescribed period for] the permissibility of wiping [over the socks] has expired. And when [the prescribed period for] the permissibility of wiping [over the socks] has expired, then the wudhoo is nullified by the [mere] passing of the [prescribed] period. [And] the Prophet (sal-Allaahu ‘alayhi wa sallam) has stipulated the wiping [over the socks] to be a single day and it’s accompanying night for the resident, and three days and their accompanying nights for the traveller. So that which is understood [from this], is that when the [prescribed] period has passed, then the [permissibility for] wiping [over the socks] is rescinded; so when this happens, it is imperative to [renew the wudhoo in full and] wash the feet [too].