The parallel account of these instructions says that Jesus told "them that they should take nothing for their journey, save a staff only" (Mark 6:8). Since "stave" and "staff" are from the same Greek word, there seems to be a slight contradiction as to what Jesus actually said. However, "provide" (Matthew 10:9) comes from a different Greek word than "take" in Mark 6:8. That is, the disciples were told to take only what they already had, namely, the ordinary walking stick which they normally carried as they walked from place to place. But they were not to make other special preparations, nor to acquire an extra staff or new shoes or an additional coat, but to rely entirely on the Lord, through His people, to provide their needs.

Source:

KJV Defenders Study Bible, by Dr. Henry Morris, Ph.D.
Publisher: Thomas Nelson
Language: English
DEF 10 ISBN 0-529-10444-x
DEF 10-1 ISBN 0-529-10445-8