Deuteronomy 33:25

The strength and firmness of Asher is as if he were shod with iron and brass (compare Revelation 1:15). The territory of this tribe probably contained iron and copper. Compare the marginal reference.

As thy days, so shall thy strength be - i. e., “thy strength” (some prefer “thy rest”) “shall be continued to thee as long as thou shalt live: thou shalt never know feebleness and decay.”