Is a resident who wipes over his socks while resident, then travels, allowed to wipe as a traveler?

If one begins wiping over his socks or khuff (leather slippers) while a resident and then travels, he completes the wiping as a traveler for three days and nights. This is the view of Abu Hanifa and one of the two narrations from Imam Ahmad, and it is the correct and most preponderant opinion. This is because the Prophet, peace and blessings be upon him, permitted the traveler to wipe for three days, and because the traveler still has some of the wiping period remaining before his journey. Thus, he is considered among the travelers who wipe for three days. Imam Ahmad returned to this opinion.