Matthew Henry Commentary Deuteronomy 33:24-25

"And of Asher he said, Blessed be Asher with children; Let him be acceptable unto his brethren, And let him dip his foot in oil. Thy bars shall be iron and brass; And as thy days, so shall thy strength be." — Deuteronomy 33:24-25 (ASV)

All things will be sanctified to true believers; if their way is rough, their feet will be shod with the preparation of the gospel of peace.

As your days, so shall your strength be. The word “day” is often used in Scripture to mean the events of the day; it is a promise that God will graciously and constantly support believers under trials and troubles, whatever they may be. This is a promise sure to all the spiritual seed of Abraham.

Do they have work allotted? They will have strength to do it. Do they have burdens appointed? They will have strength, and will never be tempted above what they are able to bear.