Just like the nations, which the Lord destroyed upon your arrival, so shall you also perish, if you have been disobedient to the voice of the Lord your God.
Other versions
King James Version
As the nations which the LORD destroyeth before your face, so shall ye perish; because ye would not be obedient unto the voice of the LORD your God.English Standard Version
Like the nations that the LORD makes to perish before you, so shall you perish, because you would not obey the voice of the LORD your God.New International Version
Like the nations the LORD destroyed before you, so you will be destroyed for not obeying the LORD your God.