Abd al-Rahman bin Abi Bakrah narrates from his father (may Allah be pleased with him), from the Prophet (peace and blessings be upon him), that he (peace and blessings be upon him) "granted the traveller a concession of three days and three nights, and the resident a day and a night, when he has put on his leather socks in a state of ablution, to wipe over them." (b) Imam al-Shafi'i (may Allah have mercy on him) narrated it from Abd al-Wahhab, but al-Rabi' was in doubt about this phrase, namely: when he has put on his leather socks in a state of ablution; whereas what was taken as Imam al-Shafi'i's (may Allah have mercy on him) statement is in fact the wording of the hadith itself.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 1340