Eleven days

“It takes eleven days to go from Horeb to Kadesh Barnea by the Mount Seir road.” Deut 1:2
Imagine being Moses, writing down the book of Deuteronomy, and writing this sentence after having spent forty long years wandering around in the wilderness. How frustrated he must have been with the people of Israel for their stubbornness and unwillingness to just believe God at His word.
The Israelites’ journey from Egypt to the Promised Land should have taken them two weeks. Instead it took them forty years. Time and time again we see their lack of belief: making the golden calf, refusing to enter the land when the ten spies brought back a bad report, attempting to collect manna on the Sabbath day, moaning and complaining time and time again that the waters were bitter and wailing that the food was better in Egypt (which might well have been true for the Pharaoh, but not for them in their slavery). Eventually Moses got so frustrated with them that he acted foolishly in striking the rock, breaking the pattern that God had been teaching them of the rock being Christ, and forfeiting his own ticket into Canaan.
We can do the same thing. Our unbelief, and our unwillingness to do that which God has told us to, will keep us in a spiritual wilderness until we make the decision to obey His word and trust in Him. The length of time you spend in that wilderness is in your own hands.