Where are mines of iron in a manner as plentiful as stones, and upon which travellers must tread, as in other parts they do upon stones; and out of whose hills thou mayest dig brass, to wit, in great plenty. These are mentioned, because they had none such in Egypt whence they came.
Related Commentaries of Deuteronomy 8:9
Deuteronomy 8:9
9 A land wherein thou shalt eat bread without scarceness, thou shalt not lack any thing in it; a land whose stones are iron, and out of whose hills thou mayest dig brass.