Deuteronomy 33:25 - Joseph Benson’s Commentary on the Old and New Testaments

Thy shoes shall be iron and brass They must have had great plenty of both these metals before they could make, or rather adorn their shoes with them, as was the custom among some nations. But we may render the words, Under thy feet shall be iron and brass, namely, mines of those metals; or, thy bolts, or bars, shall be iron and brass, for so the word here rendered shoes is translated, Song of Solomon 5:5; Nehemiah 3:3; Nehemiah 3:6; Nehemiah 3:13-15. Sidon, which was famous among the heathen for its plenty of brass, was in the tribe of Asher; and Sarepta is thought to have had its name from the brass and iron which were melted there in great quantities. As thy days, thy strength shall be Thy strength shall not be diminished with age, but thou shalt have the vigour of youth even in thy old age; thy tribe shall grow stronger and stronger. Or the words may mean, that, during their continuance as a tribe, they should not meet with any remarkable disasters, or be brought low, but continue in their full strength.