"They said: 'O Messenger of Allah! What about the purification of the leather socks?' He said: 'For the traveler it is three days and nights, and for the resident it is one day and one night.'"
Sunan Ibn Majah Book 1, Hadith 289
← Previous Hadith The Prophet said: "Three days." I think he said, "And three nights during which the traveler may wipe over his leather socks."

Sunan Ibn Majah Book 1, Hadith 288 Next Hadith → The Prophet granted a concession to travelers: "If a traveler performed ablution and put on leather socks, then he performed a fresh ablution, he could wipe over the leather socks for three days and nights; the resident could do so for one day and one night."

Sunan Ibn Majah Book 1, Hadith 290