It is narrated from Hazrat Safwan (may Allah be pleased with him) that once the Holy Prophet (peace and blessings be upon him) sent us with a detachment and said: Set out in the name of Allah, in the way of Allah, and fight against the enemies of Allah. Do not be treacherous and do not kill any child. And it is permitted for a traveler to wipe over his leather socks for three days and nights, provided he put them on while in a state of ablution, and for a resident, the permission is for one day and night.