It is narrated from Sayyiduna Khuzaymah bin Thabit (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said regarding wiping over the leather socks (khuffs): "For the traveller three days and three nights, and for the resident it is one day and one night."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 3750