American Standard Version (ASV):
For it is no vain thing for you; because it is your life, and through this thing ye shall prolong your days in the land, whither ye go over the Jordan to possess it.
King James Version (KJV):
For it [is] not a vain thing for you; because it [is] your life: and through this thing ye shall prolong [your] days in the land, whither ye go over Jordan to possess it.