It is narrated from Sayyiduna Safwan bin Assal al-Muradi (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said concerning wiping over leather socks: "For the traveller, three days and their nights, and for the resident, one day and one night."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7363