555
Sahih+3
It was narrated that Abu Hurairah said:"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
SahihAl-Albani
Sahih LighairihiMuhammad Fouad Abd al-Baqi