"'Then number seven weeks of years, that is, seven times seven years: and the space of the seven weeks of years will be unto thee forty nine years.

"'If a man sell a dwelling house in a walled city, he may buy it out again any time within a whole year after it is sold: and that shall be the space in which he may redeem it again.

But and if it be not bought out again within the space of a full year, then the house in the walled city shall be established forever unto him that bought it and to his successors after him and shall not go out in the trumpet year.