It is narrated from Sayyiduna Safwan bin Assal (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) set the period for wiping over the leather socks at three days and nights for the traveller and a day and a night for the resident.
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7356